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3 to a resonance dipolar structure of the [18]pai-conjugated system as the reduced congener with conco
4 gs has been replaced by a different (4n + 2) pai-electron system have so far been associated only wit
8 njugated covalent organic frameworks) and 2D pai-conjugated metal-organic frameworks, which are chara
9 i-conjugated polymers (also classified as 2D pai-conjugated covalent organic frameworks) and 2D pai-c
12 1,3-dipolar reaction between an imine and a pai-deficient dipolarophile in THF solution to form unna
13 servation of dispersing Majorana states at a pai-phase shift DW in a proximitized topological materia
14 vity of the reaction is attributed to both a pai-pai stacking effect and the steric hindrance between
15 bene] as red crystalline solids containing a pai-donor N-heterocyclic vinyl (NHV) substituent at the
16 e of the pore-lining helix, which contains a pai-helical segment in the closed and open conformations
17 with the aromatic SubPz core, resulting in a pai-extended chromophore that preserves the unique elect
18 te Zn(II) ions via a CN and that maximizes a pai-pai interaction with Trp(227) On the basis of these
19 n transfer through selective excitation of a pai-conjugated diblock oligomeric system featuring tetra
20 nkage plays a key role in the formation of a pai-conjugated structure, which facilitates charge trans
22 t 10(3) -fold chiroptical amplification of a pai-extended superhelicene when embedded in an achiral c
23 from 3-hydroxy-2-phenyl-4H-chromen-4-one, a pai-extended 3-hydroxyflavone photoCORM, in methanol usi
24 s essential for ligand recognition through a pai-cation interaction with the quaternary ammonium grou
26 cent donor-acceptor-donor-acceptor (D-A-D-A) pai-conjugated macrocycle comprised of two U-shaped elec
28 l reactivity of quadrupolar and octupolar A-(pai-D)(2,3) molecules with photoisomerizable A-pai-D bra
29 Both linear donor-pai-donor and acceptor-pai-acceptor structures are observed to facilitate deloc
30 i sites show not only preferential acetylene pai-adsorption, but also enhanced ethylene desorption.
31 d-valence interactions between redox-active, pai-conjugated scaffolds is of interest when developing
32 koxy group and the establishment of adequate pai-pai interactions between the biaryl and the phosphin
34 through intermolecular amide-pai and alkene-pai interactions, but little is known about the driving
35 oposed to occur through intermolecular amide-pai and alkene-pai interactions, but little is known abo
37 des AF750-6Ahx-Sta-BBN via hydrogen bond and pai-pai bonds (NGO-BBN-AF750), and investigated their re
38 Crick base pairing, Hoogsteen H-bonding, and pai-pai stacking, resulting in unusual supramolecular pa
40 is tightly bound by a network of H bonds and pai-stacking interactions involving arginine and aromati
41 Cs and CAArCs) are stronger sigma-donors and pai-acceptors than imidazol-2-ylidenes and imidazolidin-
42 P1 catalyst dyad and C-H...pai, C-H...F, and pai...pai in C2-P1) in stereocontrolling transition stat
45 e demonstrate that the direct L-An sigma and pai donations combined with the An-L delta or phi back-d
47 ne pairs leading to low lying (n, pai*) and (pai, pai*) excited states which accelerate k(isc) throug
48 rom the potassium atoms occupies antibonding pai orbitals of the SWCNTs, weakening their C-C bonds, a
49 carriers are transferred to the antibonding (pai*) orbitals of O(2) strongly hybridized with the meta
50 The cations may react with (hetero)aromatic pai-nucleophiles in various directions, depending on the
51 ntribution from the antinodal region around (pai, 0), which is shared by other competing excitations.
52 ty on the adjacent top ring reduces the aryl pai-OH sigma* energy gap with a concomitant enhancement
53 jugation along x and y directions as well as pai conduction along the z axis across the pai columns.
54 consisting of both hole pockets centred at (pai, 0) and electron pockets centred at (pai/2, pai/2).
56 4 mainly resides throughout the borafluorene pai-system, with significantly less delocalization over
58 areas where the PDW spatial phase changes by pai, as predicted by the theory of half-vortices in a PD
59 on performance of this material is driven by pai-pai stacking and multiple intermolecular interaction
61 versity with ease", by combining classic C-C pai-bond click chemistry with recent developments in con
62 pair-pai, presumably n-pai*), sp(2)C-sp(2)C (pai-pai and/or hydrophobic), sp(2)O-sp(2)N (hydrogen bon
64 th all classes of specially activated carbon pai-systems by discussing their general and specific rea
65 The chemistry of specially activated carbon pai-systems under homogeneous gold catalysis is extremel
67 -phenoxyacetophenone, the polarized carbonyl pai system apparently binds directly with the electron r
68 R complex suggests that an additional cation-pai interaction of the aromatic triazole moiety with the
69 gmented with arginine/lysine-aromatic cation-pai interactions consistently accounted for available ex
70 protease, and (b) Arg(19) which forms cation-pai interactions with Trp(291) of the S1' subsite and el
74 indicate an unusual carbohydrate-aromatic CH-pai bonding that promotes glycopeptide self-assembly.
75 ]-cycloaddition pathway and an attractive CH-pai interaction between the catalyst's tBu group and the
79 onally, we report for the first time that CH-pai interactions at Phe28 directly contribute to AF9's r
80 Potential biomaterials exploiting the CH-pai bond-based stabilization, as exemplified by an enzym
81 f saccharide-fullerene was formed through CH-pai and/or OH-pai interactions, and that the interaction
84 l overview the existing literature on chiral pai-conjugated systems whose thin films have been charac
85 ecules have assembled primarily via cofacial pai...pai stacking interactions displaying mixed D-A-D-A
89 are constructed from an unusual 12-connected pai-stacked pyrene secondary building unit (SBU) and a t
91 ction of a dilithio borole dianion, a cyclic pai-ligand isoelectronic to ubiquitous cyclopentadienyls
92 which arise from the combination of a cyclic pai-system, strong electronic communication between the
93 in many borylene (:BR) complexes via metal d(pai) ->BR back-donation, despite the electron deficiency
94 he prism[5]arene here described shows a deep pai-electron-rich aromatic cavity that exhibits a great
95 properties owing to their highly delocalized pai-systems, low-lying frontier orbitals that stabilize
97 e solid state and exhibit topology-dependent pai transmission and exciton migration; these key fundam
98 nism construction indicate that the designed pai-system provides a superior spin-delocalization effec
99 )C kinetic isotope effects (KIEs) for the di-pai-methane rearrangement of benzobarrelene fit with sta
104 ng that, to a degree, important LLPS-driving pai-related interactions are embodied in classical stati
106 lative accord with the field strength (i.e., pai-acidity) of the variable ligand, the magnitude of th
108 r resonance form (sp(3) -C) over the E=C ene pai-bonded form (sp(2) -C), as group 15 is descended.
110 hromophore ligands reveals that the expanded pai-system of the CAArC leads to relatively low energy a
112 que class of materials that combine extended pai-conjugation with a permanently microporous skeleton.
113 s resolved by chemically installing extended pai-rich alternating carbon-carbon linkages between the
115 opper complex (1(2-)) featuring an extended, pai-delocalized, tetra-amidate macrocyclic ligand (TAML)
116 nducted which revealed that the face-to-face pai-core interaction induced by benzo[2,1,3]thiadiazole
118 d helicenes are large, structurally flexible pai-frameworks that can be viewed as building blocks for
120 r polymers and liquid crystals obtained from pai-conjugated cone-shaped molecules are receiving incre
122 d synthesis has been used to prepare a fully pai-conjugated cyclic porphyrin octamer, composed of bot
125 scale), which, in combination with the fully pai-conjugated framework, makes these materials unique a
126 and exciton migration; these key fundamental pai functions are unique to sp(2) carbon-conjugated fram
127 tion of multiple reactive functional groups (pai-bonds, leaving group, etc.) is required within the s
129 mers and an increased separation of the n -> pai* bands between the trans- and cis-conformations, whi
132 t the disulfide bond is stabilized by two n->pai* interactions, each with large energies (3-5 kcal/mo
133 static interactions and the occurrence of n->pai* orbital delocalisation in C=O...C=O interactions.
136 that lp...pai contacts do not result from n->pai* orbital overlaps but from weak dispersion and elect
137 /MRCI calculations, show that (sigma, B p)->(pai, B p) transitions accelerate the ISC process.
139 ar, NCIs between the chiral catalysts (C-H...pai in C1-P1 catalyst dyad and C-H...pai, C-H...F, and p
140 led from SD/Ag78a through intercluster C-H...pai interactions can be formed by a simple drop-casting
141 hydrogen bond formation along with the C-H...pai interactions seem to be the most important factors t
142 , and due to the cap-core interaction (C-H...pai), only two enantiomeric isomers are formed (secondar
143 (C-H...pai in C1-P1 catalyst dyad and C-H...pai, C-H...F, and pai...pai in C2-P1) in stereocontrolli
144 H-bonding, solvent bonding, S-H...pai, C-H...pai, pai-pai stacking, charge-transfer complexation, etc
146 ous solution is sustained by multiple [C-H...pai] and [C-H...anion] interactions in addition to hydro
148 tions like H-bonding, solvent bonding, S-H...pai, C-H...pai, pai-pai stacking, charge-transfer comple
149 ince the PHB-Xa block copolymers have a high pai conjugate structure and hydrophobicity, the use of t
151 evidence of a tunable system wherein a HO...pai interaction switches incrementally to a nonconventio
152 ges of "switch"-starting with exclusive HO...pai, to partitioned HO...pai/OH...pai, and finally to ac
153 with exclusive HO...pai, to partitioned HO...pai/OH...pai, and finally to achieving exclusive OH...pa
154 sidues in the fibrils, including hydrophobic pai-pai interactions with aromatic rings of side chains
155 g between the ferrocenyl units and the imine pai system since breaking of the orbital symmetry result
156 stion at the indole-C3 position and improved pai-pai stacking interactions have been identified as ma
157 ndicate possibly minor role of the change in pai-electron conjugation length (and therefore conjugate
158 he reversible redox activity of azo group in pai-conjugated structures, azobenzene-based molecules re
159 e interactions between auxochromic groups in pai-conjugated functional molecules dictate their electr
168 rystallography indicates that intermolecular pai-pai stacking is completely suppressed in the crystal
169 rangement and a reduction of the interplanar pai-stacking separations by ca. 19-22% before the critic
171 , several research efforts have investigated pai-pai stacking, ionic interactions as well as formatio
172 increases with the increasing acidity of its pai system, which depends on the substituent in the 4,5-
178 gligible contribution from interlayer ligand pai-pai stacking, as incorporation of Zn(2+) in Cu-THQ s
179 ular hydrogen bonds within pyrazine ligands, pai-interactions, coordination to metal ions, and few ha
180 Herein we report the isolation of living pai-conjugated polymer chains, synthesized by catalyst-t
183 is reached at a shorter distance for the lp-pai interaction as compared to the OH-pai one (3.0 versu
184 Current interest in lone-pair...pai (lp...pai) interactions is gaining momentum in biochemistry an
185 energy decompositions, demonstrate that lp...pai contacts do not result from n->pai* orbital overlaps
187 rger pyrazinium-based cations with low-lying pai* orbitals that form the conduction band, substantial
188 a (porphinato)zinc(II) moiety with low-lying pai*-energy levels, sufficiently destabilize MC states a
189 operties of the molecular components, mainly pai-conjugated donor-acceptor (D-A) chromophores, and th
190 nt with an edge-on orientation and molecular pai-pai stacking along the coating direction on the surf
191 O- or N-lone pairs leading to low lying (n, pai*) and (pai, pai*) excited states which accelerate k(
193 he system in the in-form while a favorable n-pai* interaction reverses the orientation of the oxygen-
195 e sp(2)O-sp(2)C (lone pair-pai, presumably n-pai*), sp(2)C-sp(2)C (pai-pai and/or hydrophobic), sp(2)
197 ctronic population of the [Cu(2)(mu(2)-NAr)] pai* manifold, contrasting previous methods for engender
198 better understanding the properties of NH...pai interactions involved in the stabilization of the se
201 able structural changes and weakens the NH...pai interactions from 12-15 kcal mol(-1) in "naked" cati
202 ty and shortness (2.07 angstrom) of the NH...pai-centroid bond, was recognized as the most appropriat
203 njugated backbone and interlayer noncovalent pai-pai interactions endows TPAPC-COF with excellent abs
206 Although long acenes remain a key class of pai-conjugated molecules for numerous applications, phot
208 ere created by seeded growth of two types of pai-conjugated polymeric building blocks, the triblock c
210 ullerene was formed through CH-pai and/or OH-pai interactions, and that the interactions between sacc
216 ional (NH...O) and two nonconventional (OH...pai) HBs, dimerizes and anchors the molecule in the unit
218 usive HO...pai, to partitioned HO...pai/OH...pai, and finally to achieving exclusive OH...pai forms.
219 various analogues reveal that stronger OH...pai interactions in systems with electron-rich aromatic
220 ermining the mode of dimerization (sigma- or pai-dimer) by UV-vis spectroscopy and X-ray crystallogra
221 y matching between the ferrocene and organic pai* orbitals upon coordination, allowing superexchange
222 with built-in cavities and radially oriented pai-systems-was selected as a conceptually simple class
224 the orbital interaction, whereas the Fe -> P pai-back-donation corresponds to ~15% of the orbital int
225 irs leading to low lying (n, pai*) and (pai, pai*) excited states which accelerate k(isc) through El-
226 ding, solvent bonding, S-H...pai, C-H...pai, pai-pai stacking, charge-transfer complexation, etc.
228 alyst dyad and C-H...pai, C-H...F, and pai...pai in C2-P1) in stereocontrolling transition states are
230 have assembled primarily via cofacial pai...pai stacking interactions displaying mixed D-A-D-A stack
232 structure analysis of 1 shows a strong pai...pai stacking interaction between the electron-deficient
234 f Gh is stabilized by noncanonical lone pair-pai and CH-pai interactions, as well as hydrogen bonds.
235 le interactions are sp(2)O-sp(2)C (lone pair-pai, presumably n-pai*), sp(2)C-sp(2)C (pai-pai and/or h
236 The C-H...pai, pai...pai, and lone pair...pai noncovalent interactions (NCIs) between the N-benzyl
239 ability of the parallel arene-perfluoroarene pai-stacking arrangement and a reduction of the interpla
241 esponsible for the decay of the neutral pion pai(0) into two photons (gammagamma), leading to its unu
242 ons ([Formula: see text]), negative pions (- pai), and helium (He) ion beams resulted in 10, 17 and 1
244 se as 3.34 angstrom, clarifying out-of-plane pai-face-on molecular orientation in the nanocrystalline
245 eral approach to exploit host-enhanced polar-pai interactions in the design of robust aqueous supramo
246 A facile synthetic procedure to prepare pai-extended seven-membered phosphorus heterocycles, bot
251 y functional theory indicates that secondary pai-type interactions between the [Au@Pb(11)](3-) ligand
252 =N) is associated with improved selectivity, pai-conjugation, and reactivity at multiple points in th
253 npaired spin in the ground state, open-shell pai-conjugated molecules can achieve optoelectronic prop
254 ia their end groups/cores, with the shortest pai-pai distance as close as 3.34 angstrom, clarifying o
255 I)=N=Co(III) canonical form with significant pai-bonding between the cobalt centers and the nitride a
257 ystal structure analysis of 1 shows a strong pai...pai stacking interaction between the electron-defi
258 ngulene (TANG) building block enables strong pai-electron interactions manifested in broad absorption
259 similarity contrasts the multitude of strong pai-cation, dipole-cation, and ion-pair interactions bet
260 culation, the phenyl fragment reveals strong pai-pai interaction for steric hindrance around the meta
261 enhanced afterglow is attributed to stronger pai-pai stacking and intermolecular electronic coupling
262 tes and inhibitors and that this symmetrical pai-pai interaction "clamps" the ligand into the binding
264 a of this partially fused nanoring show that pai-conjugation extends around the whole macrocycle, and
270 rged group, for example, Me(2)NH(+), and the pai-donor is an electron-rich aromatic substituent, in p
273 The "through-space" approach harnesses the pai-pai stacking interactions between organic moieties.
274 e attractive London dispersion forces in the pai-dimers lead to improved forecasts of sigma- vs pai-d
277 ions show that the strong interaction of the pai-donating NR(2) group with the aromatic system result
281 lization of the low-spin state is due to the pai-acceptor properties of the formazanate ligand, resul
282 nts revealed that nucleophilic attack to the pai-allylpalladium intermediate is the enantio-determini
283 features of diverse ABCG2 ligands using the pai-pai clamp along with structural studies created a ph
284 demonstrated by GQD nanosurfactants via the pai-pai stacking interaction, leading to the printing of
285 and shape of the catalytic pocket, while the pai-methyl-l-histidine (Pmh) moiety transfers the electr
288 the C-terminal moiety from methoxy (21a) to pai bond-containing (23a and 23b) or cycloalkane substit
289 ation of reduced graphene oxide (RGO) due to pai-pai stacking is a recurrent problem in graphene-base
291 hannel opening is accompanied by an alpha-to-pai helical transition in the pore-lining transmembrane
295 Amide NH...O=C hydrogen bonding and various pai-system interactions have been better characterized s
297 mers lead to improved forecasts of sigma- vs pai-dimerization mode, and suggest that a balance of spi
298 ata are consistent with a mechanism in which pai-participation by the nucleophilic olefin facilitates
299 ansfer can be achieved in the complexes with pai-extended analogue of tetrathiafulvalene (exTTF), zin
300 d strength of conflict scale positively with pai, suggesting that demographic or life history factors