2016
Glycoluril-Derived Molecular Clips are Potent and Selective Receptors for Cationic Dyes in Water
SHE, Nengfang, Damien MONCELET, Laura GILBERG, Xiaoyong LU, Vladimír ŠINDELÁŘ et. al.Základní údaje
Originální název
Glycoluril-Derived Molecular Clips are Potent and Selective Receptors for Cationic Dyes in Water
Autoři
SHE, Nengfang (156 Čína), Damien MONCELET (250 Francie), Laura GILBERG (276 Německo, domácí), Xiaoyong LU (156 Čína), Vladimír ŠINDELÁŘ (203 Česká republika, garant, domácí), Volker BRIKEN (840 Spojené státy) a Lyle ISAACS (840 Spojené státy)
Vydání
Chemistry - A European Journal, WEINHEIM, Wiley, 2016, 0947-6539
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10401 Organic chemistry
Stát vydavatele
Německo
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 5.317
Kód RIV
RIV/00216224:14310/16:00088612
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000384807600005
Klíčová slova anglicky
cation-pi interactions; dyes; glycoluril; hydrophobic effects; molecular clip
Změněno: 26. 4. 2017 22:55, Ing. Andrea Mikešková
Anotace
V originále
Molecular clip 1 remains monomeric in water and engages in host-guest recognition processes with suitable guests. We report the K-a values for 32 1.guest complexes measured by H-1 NMR, UV/Vis, and fluorescence titrations. The cavity of 1 is shaped by aromatic surfaces of negative electrostatic potential and therefore displays high affinity and selectivity for planar and cationic aromatic guests that distinguishes it from CB[n] receptors that prefer aliphatic over aromatic guests. Electrostatic effects play a dominant role in the recognition process whereby ion-dipole interactions may occur between ammonium ions and the C=O groups of 1, between the SO3- groups of 1 and pendant cationic groups on the guest, and within the cavity of 1 by cation-pi interactions. Host 1 displays a high affinity toward dicationic guests with large planar aromatic surfaces (e.g. naphthalene diimide NDI + and perylene diimide PDI +) and cationic dyes derived from acridine (e.g. methylene blue and azure A). The critical importance of cation-pi interactions was ascertained by a comparison of analogous neutral and cationic guests (e.g. methylene violet vs. methylene blue; quinoline vs. N-methylquinolinium; acridine vs. N-methylacridinium; neutral red vs. neutral red H+) the affinities of which differ by up to 380-fold. We demonstrate that the high affinity of 1 toward methylene blue (K-a = 3.92 x 10(7) M-1; K-d = 25 nm) allows for the selective sequestration and destaining of U87 cells stained with methylene blue.
Návaznosti
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