Arylazopyrazole Photoswitches in Aqueous Solution: Substituent Effects, Photophysical Properties, and Host-Guest Chemistry

2018 ◽  
Vol 24 (34) ◽  
pp. 8639-8647 ◽  
Author(s):  
Lucas Stricker ◽  
Marcus Böckmann ◽  
Thomas M. Kirse ◽  
Nikos L. Doltsinis ◽  
Bart Jan Ravoo
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties ◽  
Substituent Effects ◽  
Guest Chemistry

Enantioselective Recognition of Chiral Guests by the Water-Soluble Chiral Keplerate {Mo132} Spherical Capsule with 30 Inner Lactate Ligands

2019 ◽  
Author(s):  
Nancy Watfa ◽  
Weimin Xuan ◽  
Zoe Sinclair ◽  
Robert Pow ◽  
Yousef Abul-Haija ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chiral Recognition ◽  
Association Constants ◽  
Water Soluble ◽  
Enantioselective Recognition ◽  
H Nmr ◽  
Dosy Nmr ◽  
Spherical Capsule ◽  
Surface Pores ◽  
Guest Chemistry

Investigations of chiral host guest chemistry are important to explore recognition in confined environments. Here, by synthesizing water-soluble chiral porous nanocapsule based on the inorganic metal-oxo Keplerate-type cluster, {Mo<sub>132</sub>} with chiral lactate ligands with the composition [Mo<sub>132</sub>O<sub>372</sub>(H<sub>2</sub>O)<sub>72</sub>(<i>x-</i>Lactate)<sub>30</sub>]<sup>42-</sup> (<i>x</i> = D or L), it was possible to study the interaction with a chiral guest, L/D-carnitine and (<i>R</i>/<i>S</i>)-2-butanol in aqueous solution. The enantioselective recognition was studied by quantitative <sup>1</sup>H NMR and <sup>1</sup>H DOSY NMR which highlighted that the chiral recognition is regulated by two distinct sites. Differences in the association constants (K) of L- and D-carnitine, which, due to their charge, are generally restricted from entering the interior of the host, are observed, indicating that their recognition predominantly occurs at the surface pores of the structure. Conversely, a larger difference in association constants (K<i><sub>S</sub></i>/K<i><sub>R</sub></i> = 3) is observed for recognition within the capsule interior of (<i>R</i>)- and (<i>S</i>)-2-butanol.

Substituent effects on the binding of phenols to cyclodextrins in aqueous solution

1989 ◽  
Vol 93 (18) ◽  
pp. 6863-6867 ◽  
Author(s):  
Gary L. Bertrand ◽  
James R. Faulkner ◽  
Soon M. Han ◽  
Daniel W. Armstrong
Keyword(s):  
Aqueous Solution ◽  
Substituent Effects

Amphiphilic Alternating Carbazole Copolymers: Photophysical Properties of Poly[N-vinylcarbazxole-alt-citraconic acid] in Aqueous Solution

1994 ◽  
Vol 27 (6) ◽  
pp. 1434-1439 ◽  
Author(s):  
Yoshihiro Itoh ◽  
Hideto Satoh ◽  
Tadao Yasue ◽  
Akira Hachimori ◽  
Hiroshi Satozono ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties

scholarly journals Correlating the para-Substituent Effects on Ru(II)-Polypyridine Photophysical Properties and on the Corresponding Hybrid P450 BM3 Enzymes Photocatalytic Activity

2017 ◽  
Vol 56 (11) ◽  
pp. 6558-6564 ◽  
Author(s):  
Hadil Shalan ◽  
Alexander Colbert ◽  
Thanh Truc Nguyen ◽  
Mallory Kato ◽  
Lionel Cheruzel
Keyword(s):  
Photocatalytic Activity ◽  
Photophysical Properties ◽  
Substituent Effects ◽  
P450 Bm3

Naked diazaborepin dyes: Synthesis, photophysical properties, substituent effects and theoretical calculations on ESIPT process

2020 ◽  
Vol 175 ◽  
pp. 108128
Author(s):  
Nuonuo Zhang ◽  
Genjiang Liu ◽  
Jiaying Yan ◽  
Tingting Zhang ◽  
Xiang Liu
Keyword(s):  
Theoretical Calculations ◽  
Photophysical Properties ◽  
Substituent Effects

scholarly journals Spectral properties and photophysical behaviour of water soluble cationic Mg(II) and Al(III) phthalocyanines

2014 ◽  
Vol 12 (3) ◽  
pp. 403-415 ◽  
Author(s):  
Mopelola Idowu ◽  
Yasin Arslanoğlu ◽  
Tebello Nyokong
Keyword(s):  
Aqueous Solution ◽  
Aqueous Medium ◽  
Spectral Properties ◽  
Photophysical Properties ◽  
Strong Dependence ◽  
Water Soluble ◽  
Quantum Yields ◽  
Fluorescence Lifetimes ◽  
High Solubility ◽  
Medium Ph

AbstractPeripherally and non-peripherally tetrasubstituted-[(N-methyl-2-pyridylthio)]phthalocyaninato magnesium (II) (5 and 6) and chloro aluminium (III) (7 and 8) tetraiodide have been synthesized and characterized. The photophysical properties of the complexes in dimethyl sulfoxide (DMSO) and aqueous medium in the presence and absence of cremophore EL have been studied. These complexes show high solubility in aqueous medium though they were aggregated. The triplet state quantum yields (FT) and the triplet lifetimes (tT) were found to be higher in DMSO with ΦT ranging from 0.32 to 0.51, while tT ranged from 282 to 622 ms in DMSO, compared to aqueous medium (pH 7.4 buffer) where ΦT ranged from 0.15 to 0.19 and tT from 26 to 35 ms. Addition of cremophore EL in aqueous solution resulted in partial disaggregation and increased photoactivity. The fluorescence lifetimes of the complexes showed strong dependence on their immediate environment. The ionic magnesium(II) and aluminium(III) phthalocyanines strongly bind to bovine serum albumin (BSA).

Photophysical Properties of Benzoylgermane and para -Substituted Derivatives: Substituent Effects on Electronic Transitions

ChemPhysChem ◽  
2016 ◽  
Vol 17 (21) ◽  
pp. 3460-3469 ◽  
Author(s):  
Wolfram Feuerstein ◽  
Sebastian Höfener ◽  
Wim Klopper ◽  
Iris Lamparth ◽  
Norbert Moszner ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Substituent Effects ◽  
Electronic Transitions

Host–guest chemistry of cyclodextrin carbamates and cellulose derivatives in aqueous solution

2013 ◽  
Vol 98 (1) ◽  
pp. 982-987 ◽  
Author(s):  
Xin Guo ◽  
Xiangxiang Jia ◽  
Jiaojiao Du ◽  
Longqiang Xiao ◽  
Feifei Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Cellulose Derivatives ◽  
Guest Chemistry
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