ライフサイエンスコーパス: crown ether

1 polyether ligands: L(C) (cryptand) and L(E) (crown-ethers).

2 a fraction or all of Na(+) is chelated by a crown ether.

3 t inhibit binding of the ammonium ion to the crown ether.

4 e hydrogen bond acceptor oxygen atoms in the crown ether.

5 ds to binding of these metal ions within the crown ether.

6 f Y6 with higher-polarity phenanthroline and crown ether.

7 ction is accelerated through the cavity of a crown ether.

8 ation of a stable host-guest system with the crown ether.

9 e 1,2-bis(benzimidazole)ethane motif for the crown ether.

10 ring a rhodol chromophore linked with an aza-crown ether.

11 r])V C(t) Bu(OEt(2) ) (3) in the presence of crown-ether.

12 strates, including biotin, chromophores, and crown ethers.

13 ether bridges, as well as benzimidazolidine crown ethers.

14 ced gas sorption capacity compared with pure crown ethers.

15 is of the known complexation behavior of the crown ethers.

16 med by studying alkali metal ion coordinated crown ethers.

17 ease in Na(+) solubility due to binding with crown ethers.

18 the subsequent amine conjugation for various crown ethers.

19 covalent exchange and the binding of simple crown ethers.

20 st paper describing his synthesis of over 50 crown ethers.

21 ng capacity that is >/=18 times that of thio-crown ethers.

22 that of complexes between metal cations and crown ethers.

23 e sensor molecules based on N-methylbenzoaza-crown ethers.

24 tions in a manner similar to that found with crown ethers.

25 columnar self-assembly of triarylamines and crown-ethers.

26 y prepared from Na(+) encapsulation with the crown ether 1,4,7,10,13,16-hexaoxacyclooctadecane (18-C-

27 tion of the sodium cation by the polydentate crown ether 12-crown-4.

28 A series of crown ethers, 12-crown-4, 15-crown-5, 18-crown-6, and di

29 s and free carbanions by the addition of the crown ether 18-crown-6, which facilitates the evaluation

30 duce the extent of compound fragmentation, a crown ether, 18-crown-6, was added postcolumn to the sys

31 of nanoswitch 1 and the anthracene-appended crown ether 2 is infallibly driven by chemical triggers

32 first examples of dianionic 10-membered bora-crown ethers (2-5), which are characterized by multi-nuc

33 ring groups, locking the location of a small crown ether (21C7 and 24C8 derivatives) over the amine g

34 ation system, the concentrations of free aza-crown ether 7 and its complex with copper(I), that is, [

35 g a synergic combination of bulky diols with crown ethers able to accelerate this kind of reaction.

36 H(2) , a stoichiometric alkoxide base, and a crown-ether additive.

37 es how microsolvation of charged sites using crown ethers affects native-like alpha-helical structure

38 Binding constants of several crown ether-alkali metal cation complexes that were prev

39 Experiments with crown ether-alkali metal complexes confirm the validity

40 nt" binding involving axial coordination and crown ether-alkyl ammonium cation complexation to form t

41 n of highly-scalable silicon photonics, with crown ether amine conjugation via Fischer esterification

42 own-8) esters derived from the hydroxymethyl crown ether and aliphatic diacid chlorides (CxC, x = num

43 ctionalized bambusurils were conjugated with crown ether and cholesterol units.

44 g; and (iii) host-guest interactions between crown ether and dialkylammonium substrates.

45 a hydrogen bonding network within a pendent crown ether and preventing the binding of strong donor l

46 eaving three remaining Rb(+) ions wrapped by crown ether and THF molecules.

47 thway and that the complex interplay between crown ether and thread can be controlled in a transient

48 sol-gel, and silica sol-gel impregnated with crown ether and with active carbon, were deposited on th

49 axane:axle selectivity, from primary amines, crown ethers and a range of C=O, C=S, S(=O)(2) and P=O e

50 ccupy guest positions in bimetallic, inverse crown ethers and C(4) fragments ultimately appear in bim

51 ed receptors, including, but not limited to, crown ethers and cryptands, is responsible for the very

52 he hydrogen bonding interactions between the crown ethers and ferrioxamine B.

53 uctural and thermodynamic data available for crown ethers and ion channels.

54 d others), organic ligands (O- and N-donors, crown ethers and related molecules, MALDI matrix molecul

55 stabilizing CH...O interactions between the crown ethers and the polyethylene glycol catchment regio

56 interaction modes: hydrogen bonding between crown ethers and thioureas and the halogen bonding betwe

57 vy metal binding selectivities of five caged crown ethers and two polyether reference compounds in me

58 eir diprotonated form in the presence of the crown ether, and both nitrogen atoms appear to associate

59 n ((2)D) (teicoplanin, teicoplanin aglycone, crown ether, and zwitterionic quinine and quinidine carb

60 molecular pumps sequester from the solution crown ethers appended with fluorescent tags.

61 ddress this deficit, we have synthesized two crown ether-appended Mg-porphyrin complexes as chlorophy

62 Crown ethers are an important family of compounds that a

63 Crown ethers are at their most basic level rings constru

64 Crown ethers are central to supramolecular chemistry, re

65 However, crown ethers are typically highly flexible, frustrating

66 Thus, crown ethers are useful in modeling the size-selective b

67 Our catalytic strategy merges (i) the use of crown ethers as ammonium-binding receptors and (ii) the

68 raphiles are synthetic ion channels that use crown ethers as entry portals and that span phospholipid

69 Since their discovery, crown ethers as well as the most recent carbon nanostruc

70 lectronic unit for halide perovskites, and a crown ether-assisted supramolecular assembly approach ca

71 containing oligomeric ether units (including crown ethers) attached to the arylsulfonyl ring in the o

72 A crown ether based charge reduction approach was applied

73 ppropriate divalent as well as a luminescent crown ether based host 1 and paraquat derivatives, 2(PF(

74 The back and forth motions of a crown-ether based wheel along the axis of a bistable rot

75 d organic ligands including cation-chelating crown ether-based linkers.

76 evealed how stepwise hydration unbuckles the crown ether belt from Li(+) and Na(+), substantially cha

77 ng investigations reveal sodium cation-benzo-crown ether binding dramatically enhances the recognitio

78 tely 19 A (the maximum distance spanning the crown ether binding sites in PBC).

79 However, crown ether binding to the N-methyltriazolium site inhib

80 compounds, which were used to represent the crown-ether blocking group and the axle of a rotaxane.

81 Since the accidental discovery of the crown ethers by Pedersen half a century ago, the chemist

82 In the electrically neutral crown ether (C2H4O)6, six ethylene oxide monomers are li

83 arious scaffolds (cyclodextrins, porphyrins, crown ethers, calix[n]arenes, resorcin[n]arenes, pillar[

84 Although crown ethers can selectively bind many metal cations, li

85 scribed, based on a highly sodium-selective, crown ether-capped calix[4]arene ionophore, capable of r

86 istry and were prominent in the discovery of crown ethers, carcerands and catenanes.

87 ering rotaxane cleavage and the release of a crown ether cargo.

88 increase in the reaction rate in relation to crown ether catalysis only.

89 The synthesis of new iridium pincer-crown ether catalysts based on an aza-18-crown-6 ether p

90 The KF/crown ethers catalytic systems proved to be highly effic

91 used in synergistic combination with a model crown ether cation host was shown to have a strong effec

92 Cyclodextrins/aromatic rods, crown ethers/cationic rods and pillararenes/alkyl chains

93 -resolution time-of-flight measurements with crown ether (CE) complexation and flow injection analysi

94 Herein we report the use of crown ether (CE) to catalyze the polymerization of NCA i

95 se protein ions by noncovalent attachment of crown ethers (CEs).

96 During its directional transport, the crown ether changes conformation according to the stereo

97 c investigations using an organic cation and crown-ether chelated alkali metal cations show that spec

98 s from the immobilization of the Pb2+ by the crown ether chelating groups.

99 Two crown ether chemosensors featuring a boron azadipyrrin c

100 The abilities of the crown ether clusters to complex with these monovalent li

101 In this compound, the two crown ethers compete for the sole recognition site, but

102 When the cationic Sr-crown ether complex is created in a two-phase water-RTIL

103 When a Sr(NO(3))(2)-crown ether complex is directly dissolved in a water-sat

104 M(-1)), leading to Li(+) extraction from its crown ether complex.

105 Here we show that a Cf(II) crown-ether complex, Cf(18-crown-6)I(2), can be prepared

106 single MnX(4) tetrahedra coordinated to the crown-ether complex.

107 ) and urea nitrate (UN) in the presence of a crown ether complexation agent were explored by using hi

108 The general applicability of this crown ether complexation approach to clinical samples wa

109 spatial separation of the XB donors and the crown ether complexed potassium cation resulted in a rar

110 he presence of poorly resolved conformers of crown ether complexes and peptides leading to more accur

111 water-RTIL system, however, only cationic Sr-crown ether complexes are observed in the RTIL phase.

112 The Sr(II)-crown ether complexes formed in a room-temperature ionic

113 s known regarding the solution properties of crown ether complexes of the uranyl dication, UO(2)(2+).

114 r the activation of laser-desorbed metal ion-crown ether complexes was examined.

115 there are no prior reports of reduced uranyl crown ether complexes, but U(V) is clearly stabilized by

116 ctroscopic trends observed from other Sm(2+) crown-ether complexes containing iodide counterions, whe

117 ubstituents to allow their interactions with crown ether compounds to be probed by (19)F NMR spectros

118 lysine substitution(s) in neutral synthetic crown ether containing 14-mer peptide affect the peptide

119 acceptor [2]catenane, which is composed of a crown ether containing a hydroquinone unit and a 1,5-dia

120 A crown ether-containing macrobicycle was used as the whee

121 saturated RTIL, both nitrate ligands and the crown ether coordinate the Sr, as observed in a conventi

122 bility of our recently reported well-defined crown ether-coordinated alkali metal phosphides 1(AM) to

123 The crown-ether coordination compounds ZnX(2)(18-crown-6), E

124 ed by binding positively charged ions to the crown ether core, highlighting the potential for applica

125 of complexes of polyether ligands including crown ethers, cryptands, glycols, glymes, and related po

126 Crown ether derivatives exhibit selectivity to Na(+) and

127 rotaxanes that utilize both metal-ligand and crown ether-dialkylammonium noncovalent interactions are

128 ds was compared with those of the monovalent crown ethers dibenzo[24]crown-8 and benzometaphenylene[2

129 The derived crown ether diol 1d was converted to pyridyl cryptand 12

130 at the triaroylbenzene-derived bis- and tris-crown ethers do not engage in intramolecular chelation o

131 Complexation of the three crown ethers documented both crown and substituent depen

132 The crown ether does not inhibit enzymatic proteolysis over

133 of the same basic structures of the original crown ethers embedded in graphene.

134 on group that binds the analyte selectively (crown ethers for metal ions), or a molecular-recognition

135 d selectivities of these monoaza-substituted crown ethers for Na(+), K(+), Cs(+), and Sr(2+) were stu

136 of 1 by two electrons and in the presence of crown-ether forms the tetraanionic N(2) complex [K(2)][K

137 a molecular energy ratchet that transports a crown ether from solution onto a thread, along the axle,

138 ion motif, in which boronic acid and PEG (or crown ether) functional groups are prepositioned in a ph

139 both redox-active ferrocenyl and host-guest crown ether functionalities has been achieved via coordi

140 trol over positioning of either ferrocene or crown ether functionalities.

141 4,4'(5')-bis-t-butylcyclohexano-18-crown-6 (crown-ether) functionality with high selectivity for Sr

142 A crown-ether-functionalized o-phenylene tetramer has been

143 ontrolled by thermal, pH (i-motif), K(+) ion/crown ether (G-quadruplexes), chemical (pH-doped polyani

144 d on paraquats or viologens (G(2+)2X(-)) and crown ethers (H).

145 nes with electrophiles through the cavity of crown ethers has proved effective for forming an array o

146 nding abilities of these mono- and polytopic crown ethers have been probed through picrate extraction

147 Eleven anthracylmethyl crown ethers have been synthesized and evaluated as fluo

148 stems (dimers 3 and 4) endowed with suitable crown ethers have been synthesized as receptors for a fu

149 Crown ethers have been used for increasing the solubiliz

150 al 1:2 complexation between an electron-rich crown ether host and electron-deficient naphthalene diim

151 viologen residue in these dendrimers and the crown ether host bis-p-phenylene-34-crown-8 were also in

152 The crown ether hosts induce the formation of host-guest com

153 solvents on coordinate bonding (e.g., cation-crown ether), hydrogen bonding, halogen bonding, dipolar

154 solvents on coordinate bonding (e.g., cation-crown ether), hydrogen bonding, halogen bonding, dipolar

155 n of 1:1 and 1:2 complexes of a fluorophilic crown ether in fluorous ISE membranes and how this resul

156 By using 5 mM crown ether in the organic phase and 10 mM CsNO3 with 0.

157 rees unidirectional rotation of up to 87% of crown ethers in a [2]catenane rotary motor.

158 Crown ethers in graphene offer a simple environment that

159 These monoaza-substituted crown ethers in ionic liquids were investigated as recyc

160 d 1D ensemble was used to order the appended crown ethers in such a way that they roughly stack on to

161 from Pedersen's ground-breaking discovery of crown ethers in the mid-1960s.

162 rical diols for the synthesis of macrocyclic crown ethers in the presence of Ni-zeolite as a catalyst

163 comprising a polymerizable ammonium salt and crown ether, in combination with dynamic ADMet polymeriz

164 ors for Na+ and K+ have been fabricated from crown ethers incorporated into polymeric hydrogels.

165 based, first, on the complementary ammonium-crown ether interaction and, second, on the pi-pi intera

166 ionalized fullerene, crown-C60, via ammonium-crown ether interactions to yield SWNT/Pyr-NH3+/crown-C6

167 d viologen unit assembles with a 24-membered crown ether into a stable host-guest complex displaying

168 olyfluorene grafted with a K(+)-intercalated crown ether involving six oxygen atoms (PFCn6:K(+)) for

169 efficient single-ion transport and advances crown ether ion selectivity in nano-restricted environme

170 Cross sections for the series of crown ether ions and complexes that are observed are rep

171 The crown ether is a useful chiral discriminating agent for

172 In this approach, a crown ether is added to a solution containing a mixture

173 The crown ether is designed to act as a host toward biologic

174 ee cationic guest species, G(+), by the host crown ether is independent of counterion.

175 oefficient for Pb(2+) into a control gel (no crown ether), K(p), is 1.00 +/- 0.018 (errors reported a

176 /or the outer hydrogel layer to acidic pH or crown ether leads to the triggered separation of the bri

177 The pincer-crown ether ligand exhibits tridentate, tetradentate, an

178 ated in a pentadentate fashion by the pincer-crown ether ligand.

179 al cation binding with a macrocyclic "pincer-crown ether" ligand.

180 ectrometry carried out on solutions of these crown ether-like bridges confirmed that Li+, Na+, and K+

181 four monomers coordinate a single K(+) in a crown-ether-like structure, with, on average, 1.5 cation

182 Association of the ammonium ion with the crown ether likely involves two hydrogen bonds with the

183 genic covalent units to an otherwise achiral crown ether macrocycle bearing a luminescent 2,2'-bipyre

184 nkers are [2]rotaxanes with varying sizes of crown ether macrocycles ([22]crown-6, 22C6; [24]crown-6,

185 tinguishable host-guest interactions between crown ether macrocycles and ammonium with different size

186 t in the presence of fuel continuously pumps crown ether macrocycles from bulk solution onto a molecu

187 Since the discovery of crown ethers, macrocycles have been recognized as powerf

188 psed conformation (COL) of BCETB, where both crown ether moieties (CEs) of BCETB are bent in toward t

189 The host-guest recognition properties of the crown ether moieties and their ability to complex cation

190 ween the protonated aliphatic amines and the crown ether moieties embedded in the scaffold of the aro

191 ecule is detrimental to the abilities of the crown ether moieties to complex with monovalent dialkyla

192 bonds between the terminal NH3(+) groups and crown ether moieties was detected in MeCN solutions.

193 Introduction of a crown ether moiety allows changing the photoreaction par

194 caffold with a flexible, weakly donating aza-crown ether moiety are reported.

195 , we prepare a tetratopic XB donor bearing a crown ether moiety for sodium cation sequestration.

196 etween the two aromatic units of each folded crown ether moiety in 1.

197 Recognition of Na+ by the crown ether moiety in CE-bpy results in a significant in

198 tive carboxamide groups and an uncoordinated crown ether moiety in close proximity to a high-spin pse

199 ino acid promoter (L-Ala), that binds to the crown ether moiety of 1 via electrostatic interactions,

200 organoplatinum(II) acceptor decorated with a crown ether moiety that provide the basis for self-assem

201 pe-persistent monomer, containing a flexible crown ether moiety, gives an initial Archimedean-based c

202 nitrogen atoms appear to associate with the crown ether moiety.

203 oidal array (PCCA) hydrogel which contains a crown ether molecular recognition group.

204 ilities than the naked peptide ions, and the crown ether molecules appear to interact specifically wi

205 Here, we provide a new method by including crown ether molecules in the solvent for nanospray desor

206 tudies of aromatic ions and protonated amine/crown ether noncovalent complexes generated via ion/mole

207 These agents, dubbed crown ether nucleophilic catalysts (CENCs), are 18-crown

208 fulvalene unit in a mechanically interlocked crown ether occupies the cavity of a cyclobis(paraquat-p

209 ibenzylammonium guest between the switchable crown ethers of slightly different sizes.

210 crown-based pathways in which 15-crown-5-the crown ether often said to be of choice for sodium-was de

211 The mechanism uses the position of a crown ether on an axle both to promote barrier attachmen

212 and in each case the unique position of the crown ether on the peptide axle was confirmed by (1)H nu

213 Encapsulation of K(+) in 2 with crown-ether or cryptand affords the first discrete salt

214 Triarylamine molecules appended with crown-ethers or carboxylic moieties form self-assembled

215 likely involves two hydrogen bonds with the crown ether oxygen atoms and an ion pair with the carbox

216 n bonding between the ammonium group and the crown ether oxygen atoms.

217 oprotein-derived nanotracer with a perfluoro-crown ether payload ((19)F-HDL) to allow myeloid cell tr

218 the metal-free active template synthesis of crown ether-peptide rotaxanes.

219 They are homologues of dibenzo crown ether phase-transfer catalysts and were prepared f

220 spacer to an electron donor and a H-bonding crown ether polycycle.

221 Dibenzotetraaza (DBTA) crown ethers possess two o-phenylenediamine moieties.

222 ng of Na(+)-ions to the highly selective aza-crown ether receptor due to reduction of the photoinduce

223 nal COF channels facilitate transport, while crown ether recognition makes the Na(+) energy barrier s

224 Due to crown ether recognition of sodium ions, channels in DHTA

225 esidues (e.g., Bronsted or Lewis acid/bases, crown ethers, redox groups etc.) has been shown to be eq

226 logous chromoionophores based on N-phenylaza-crown ethers regarding both the ionochromism and the cat

227 ycol) diacids gives macrocycles analogous to crown ethers, representing minimal examples of out-of-eq

228 in which a 1,5-dioxynaphthalene unit in the crown ether resides inside the cavity of the tetracation

229 on of external K with 15 mM of 18-Crown-6 (a crown ether) restored inactivation even in the absence o

230 h the metal cation located in the receptor's crown ether ring and the trigonal oxyanion hydrogen bond

231 remote recognition site for the interlocked crown ether ring through electrochemical stimulation.

232 ic sensors feature either 18- or 27-membered crown ether rings and have been evaluated as visible sen

233 When the crown ether rings are 14-crown-4, 15-crown-5, and 18-cro

234 lent hydrolytic stability make compact amine-crown ether rotaxane superbases intriguing candidates fo

235 d the mechanical dissociation of an ammonium/crown ether rotaxane using experimental (sonication) and

236 family of organic superbases, compact amine-crown ether rotaxanes, which show desirable characterist

237 Symmetrical tris(crown ether)s possessing three benzo(15-crown-5) or thre

238 ntrol-1 cross-linked by the weakly complexed crown ether/secondary ammonium salt motif (tensile stren

239 ructure-reactivity correlations of the three crown ethers show mono- and bis-crown-based pathways in

240 imized film compositions containing 50 mol % crown ether showed substantial responses (< or = 200 nm)

241 r-none response, as the vast majority of the crown ether sites must be occupied with a promoter for a

242 R, we determined that binding to the 4 or 16 crown ether sites occurred in an anti-cooperative fashio

243 DFT calculations suggest crown ether sodium cation complexation induces a polaris

244 y functional theory indices characterize the crown ether solvated complex benzene-lithium Bz-Li-Cro a

245 e sodium salts of calixarene derivatives and crown ether solvents.

246 introduce a pentacene dimer with a flexible crown ether spacer enabling a control of the interchromo

247 form a 3-imino-1-oxoisoindoline derivatized crown ether species.

248 Reported herein are two functionalized crown ether strapped calix[4]pyrroles, H1 and H2.

249 is seen in the case of a previously reported crown ether "strapped" calixarene-calixpyrrole ion-pair

250 quaternary ammonium Cinchona-functionalized crown ether-strapped calix[4]arene phase-transfer cataly

251 itions where a Cs(+) cation was bound to the crown ether-strapped calix[4]arene subunit.

252 systems based on ammonioalkyl derivatives of crown ether styryl dyes.

253 on interactions between the metal halide and crown-ether supramolecules.

254 e with paraquat, 9000 times greater than the crown ether system.

255 lity-mass spectrometry (IM-MS), we find that crown ethers that bind to lysine side chains promote mor

256 ion and solid states even in the presence of crown ethers that compete for Li(+) coordination.

257 we report on a molecular ratchet in which a crown ether (the 'reading head') is pumped from solution

258 ound Pb2+ ions have a slow off rate from the crown ether, the bound Pb2+ PCCA diffraction transiently

259 sly developed templated syntheses of dibenzo crown ethers, this protocol makes powerful cryptand host

260 ses in aqueous solution, ranging from simple crown ether to complex enzyme-ligand interactions.

261 e actuated by the binding of the Pb2+ to the crown ether to immobilize the Pb2+ counterions.

262 tonated by the carboxylic acid groups of the crown ether to produce the corresponding ammonium and ca

263 This arrangement constrains the crown ethers to be rigid and planar.

264 Herein, we employ crown ethers to modulate perovskite films, affording pas

265 nstances, it was found that clustering seven crown ethers together into one molecule is detrimental t

266 atives, by using a mixture of sodium powder, crown ether, trimethylsilyl bromide and N(2) as the nitr

267 The resulting crown ether-tripeptide rotaxane can subsequently be exte

268 Tested on a set comprising two crown ethers, two thioureas and five halogen bond donors

269 spherical Keplerate-type capsules having 20 crown-ether-type pores and tunable internal functionalit

270 enebis(salicylideneaminato)) appended with a crown ether unit containing Na(+) (1-Na), K(+), (1-K), B

271 forward method for assembling multiple benzo(crown ether) units around 1,3,5-triaroylbenzene scaffold

272 Crown ether variants with different cavity sizes and ele

273 A flexible, pyridine-functionalized diaza-crown ether was self-assembled into discrete supramolecu

274 The identity of the crown ethers was further established using single-crysta

275 ing of an ibuprofen unit connected to a half crown ether, was added to the verbenoxy-COT(2)(-),M(+)(2

276 N-Aryl-aza-crown ethers were efficiently prepared by reaction of an

277 N-Aryl-aza-crown ethers were produced in 75-91% yields.

278 Crown ethers were selected for their reactivity distinct

279 sters of a homologous series of hydroxyether crown ethers were synthesized and copolymerized with hyd

280 um cations, comparable to those reported for crown ethers, were observed for an alternated N-benzylgl

281 niversary of Charles Pedersen's discovery of crown ethers, what is widely considered the birth of sup

282 e axle with a 1,10-phenanthroline containing crown ether wheel.

283 t work investigates this strategy in alkynyl crown ethers, where propargylic C-O bonds contained with

284 based on an overcrowded alkene strapped with crown ethers, which can be switched by both redox and li

285 This work harnesses the unique abilities of crown ethers, which selectively bind to specific ions.

286 e efficiently prepared by reaction of an aza-crown ether with an aryl bromide via a palladium-catalyz

287 In this paper, we have designed a new crown ether with four hydroxyl groups strategically posi

288 two bistable [2]catenanes--one containing a crown ether with tetrathiafulvalene and dioxynaphthalene

289 d between secondary dialkylammonium ions and crown ethers with a [25]crown-8 constitution, however, r

290 Sterically congested o-terphenyl crown ethers with alkoxy substituents at the 2,3,4-posit

291 Reaction of the DBTA crown ethers with alkyl and benzyl halides was found to

292 red benzimidizoles were used to produce DBTA crown ethers with modified substituents and ether bridge

293 N-Aryl-aza-crown ethers with o-aryl substituents can also be synthe

294 to be a convenient route to a new family of crown ethers with overall yields of up to 48% based on t

295 Interaction of alkali metal-bound crown ethers with the [M(IV)X(6)](2-) octahedron resulte

296 es, the strategy enables 1:1 interactions of crown ethers with various functional groups to be charac

297 1:1 and 1:2 complexes with the fluorophilic crown ether, with cumulative formation constants of up t

298 l that the self-assemblies incorporating the crown ethers work as single channels for the selective t

299 cile, rapid, and high yield synthesis of [23]crown ether (X23C7) has been developed from commercially