ライフサイエンスコーパス: cryptand

1 capsulation of a Cs(+) counterion with 2.2.2-cryptand.

2 bonds to N-H groups from the hexacarboxamide cryptand.

3 ulated F(-) complexes of the two amide-based cryptands.

4 but 1 and 2 were especially effective, where cryptand 1 was the most active, particularly in the chro

5 Cryptand 12 exhibits the highest association constant fo

6 crown ether diol 1d was converted to pyridyl cryptand 12 in 44% yield by reaction with pyridine-2,6-d

7 The binding constant of diquat 4 by cryptand 12 is nearly 6-times higher than any other repo

8 (RO)(3)Li(2-), which were also observed when cryptand [2.1.1] was used as a cosolvent, or when mixed

9 cosolvent additives PMDTA, TMTAN, HMPA, and cryptand [2.1.1].

10 tion of [Co(I)2(bis-(OMe)salophen)Na2Py4][Na(cryptand)]2, 8.

11 lophen ligand, [Co((OMe)salophen-CO2)Na]2[Na(cryptand)]2, 9, was isolated but CO3(2-) formation in 53

12 in acetonitrile containing a large excess of cryptand[2.2.2] exhibits a Hush-type intervalence charge

13 directed synthesis of a per-aza analogue of cryptand[2.2.2] in which each of the linking arms contai

14 udorotaxane complex of the new hydroxymethyl cryptand 3 with N,N'-dimethyl-4,4'-bipyridinium bis(hexa

15 rm para to the ester linkages, "short-armed" cryptand 3, did display a higher binding constant (Ka =

16 diols 7 and 10 to the corresponding pyridyl cryptands 3 and 4 by reaction with pyridine-2,6-dicarbon

17 ding the complex [(Co((OMe)salophen))2Na][Na(cryptand)]3, 7.

18 arm para to the ester linkages, "long-armed" cryptand 4, possessed diminished binding with both paraq

19 Cryptands 4 and 5 were synthesized from cis- and trans-b

20 in a controllable manner on the basis of the cryptands' abilities to complex KPF6 strongly, providing

21 the supporting ligands 18-crown-6 and [2.2.2]cryptand allows the selective formation of contact ion p

22 The cryptands also form complexes with ammonium hexafluoroph

23 this interaction has been reported between a cryptand and paraquat.

24 were performed for 19 distances between the cryptand and the chloride.

25 ence of macrocyclic polyether ligands: L(C) (cryptand) and L(E) (crown-ethers).

26 All of the cryptands appear to encapsulate F(-) in solution, where

27 3Th with H2 in the presence of KC8 and 2.2.2-cryptand at -45 degrees C produced two monometallic hydr

28 Various cryptands based on 1,3-dioxane decorated 1,3,5-trisubsti

29 For the first time it was found that in cryptand-based complexes, different stoichiometries are

30 Formation of the paraquat/cryptand-based pseudorotaxanes can be switched off and o

31 Exploration of this 2.2.2-cryptand-based reaction with the remaining lanthanides f

32 It was found that these cryptands bind paraquat derivatives very strongly.

33 of 3a and the previously reported homologous cryptand, bis(1,3,5-phenylene)tri(1,4,7,10,13-pentaoxatr

34 A new cryptand, bis(1,3,5-phenylene)tri(1,4,7,10-tetraoxadecyl

35 Crystal structures are reported for both cryptands, both paraquat diol-based pseudorotaxanes, bot

36 ducts, namely, (C5Me4H)3ThH, 5, and [K(2.2.2-cryptand)]{(C5Me4H)2[eta(1):eta(5)-C5Me3H(CH2)]ThH]}, 6.

37 The chloride can bind either inside the cryptand cavity or more loosely outside of the ligand.

38 e chloride into a stable position inside the cryptand cavity.

39 tary hydrogen bonds with the hexacarboxamide cryptand, [CO3 subsetmBDCA-5t-H6](2-) (2), a conclusion

40 K+ displaces paraquat diol from the cryptands, converting yellow-orange solutions to colorle

41 nt lanthanide complex salts, namely [K(2.2.2-cryptand)][Cp'3Ln] (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd,

42 These Ln(2+) complexes, [K(2.2.2-cryptand)][Cp'3Ln] (Ln = Y, Pr, Gd, Tb, Ho, Er, Lu), all

43 s, Cp'3Ln, 1, (Cp' = C5H4SiMe3) and [K(2.2.2-cryptand)][Cp'3Ln], 2, respectively, have been synthesiz

44 Y(2+), Ho(2+), and Er(2+) analogs: [K(2.2.2-cryptand)][Cp'3Ln].

45 .2.2-cryptand generates crystalline [K(2.2.2-cryptand)][Cp'3U], the first isolable molecular U(2+) co

46 hat this was not the U(3+) hydride, [K(2.2.2-cryptand)][Cp'3UH], which could be crystallographically

47 of Sc(NR2 )3 with K in the presence of 2.2.2-cryptand (crypt) and 18-crown-6 (18-c-6) and with Cs in

48 for linear coordination of Hg2+, whereas the cryptand derivative favors Pb2+ because of its larger ca

49 referentially bind Hg2+, except for the cage cryptand derivative, which favors Pb2+.

50 g comparable to the most effective bis(tren) cryptands despite binding anions via only three NH group

51 can be obtained in gram quantities from the cryptand-driven disproportionation reaction of potassium

52 lly reversible reduction of oxygen (O(2)) to cryptand-encapsulated O(2)(2-).

53 The new cryptands form pseudorotaxanes with the paraquat derivat

54 potassium graphite in the presence of 2.2.2-cryptand generates crystalline [K(2.2.2-cryptand)][Cp'3U

55 of polyether ligands including crown ethers, cryptands, glycols, glymes, and related polyether ligand

56 o crown ethers, this protocol makes powerful cryptand hosts readily available in gram quantities in g

57 m Ni(CO)(2)(PPh(3))(2), K(4)Sn(9), and 2,2,2-cryptand in en/toluene solvent mixtures.

58 red from Pt(PPh(3))(4), K(4)Sn(9), and 2,2,2-cryptand in en/toluene solvent mixtures.

59 With 2.2.2-cryptand in place of 18-crown-6 in the Cp'3Ln/K reaction

60 Chloride movement toward the cryptand is accompanied by stepwise dehydration of the a

61 This readily accessible cryptand is one of the most powerful hosts reported for

62 luding, but not limited to, crown ethers and cryptands, is responsible for the very high binding cons

63 3 reacts with the cryptand Krypt211 to form [Li(Krypt211)][(OPO)PdMe(py')]

64 s residing on the bridging O-atom and on the cryptand ligand for the case of 2.

65 A new class of cryptand-like ionophore based on a bis calix[4]arene str

66 tein can template its assembly into a unique cryptand-like protein complex ((C81/C96)RIDC14) by guidi

67 The system under study consisted of a cryptand molecule, chloride ion, and 319 water molecules

68 guest occupies parts of the cavities of two cryptand molecules.

69 d Cs(+), as well as the separated ion pair K(cryptand)(+)NB(-*)-both series of which are structurally

70 (PyTFSI)-templated syntheses of 2,6-pyridyl cryptands of cis(4,4')-dibenzo-30-crown-10 (3a), the p-b

71 asier NMR assignment of the structure of the cryptands on the other side.

72 Two novel bis(m-phenylene)-32-crown-10-based cryptands, one bearing covalent linkages and the other m

73 rown-6 binds the KPF6 and allows the colored cryptand-paraquat complex to reform.

74 than the analogous dibenzo-30-crown-10-based cryptand previously studied; however, the effect was onl

75 plete encapsulation of the alkali metal with cryptand provides the terminally bound nitride as a disc

76 ate for plutonium, namely Pu(2+) in [K(2.2.2-cryptand)][Pu(II)Cp''3], Cp'' = C5H3(SiMe3)2.

77 N)3Sc]2[mu-eta(1):eta(1)-N2]} (crypt = 2.2.2-cryptand, R = SiMe3), has been isolated from the reducti

78 The [K(2,2,2-cryptand)](+) salt is very air and moisture sensitive an

79 The [K(2,2,2-cryptand)](+) salt is very air and moisture sensitive, i

80 de capture from water by the tetraprotonated cryptand SC24 is presented.

81 es showed that the pyridine-containing amide cryptand shows the highest affinity (K(a) > 10(5) in DMS

82 irradiation and without the assistance of a cryptand, such as K2.2.2, primary substrates with select

83 ne solvent mixtures in the presence of 2,2,2-cryptand to give four different complexes: "Rudolph's co

84 ooperative change in the conformation of the cryptand when the Cl- starts to enter the ligand and jus

85 Specifically, a diester cryptand with a pyridyl nitrogen atom located at a site

86 independent synthesis: treatment of (i) free cryptand with K2CO3; (ii) monodeprotonated cryptand with

87 e cryptand with K2CO3; (ii) monodeprotonated cryptand with PPN[HCO3]; and (iii) free cryptand with TB

88 ated cryptand with PPN[HCO3]; and (iii) free cryptand with TBA[OH] and atmospheric CO2.

89 Also as expected, the cryptand with the tetra(ethyleneoxy) arm para to the est

90 from Corey-Pauling-Koltun (CPK) models, the cryptand with the tri(ethyleneoxy) arm para to the ester

91 Four new bis(m-phenylene)-32-crown-10-based cryptands with different third bridges were prepared.