A newly designed stiff-stilbene functionalized biscalix[4]arene in its cis form Z-1 could be near-quantitatively photoswitched to the trans-isomer E-1 under irradiation of 385 nm UV light. The trans-biscalix[4]arene E-1 was found to be a supergelator in nonpolar organic solvents, e.g., cyclohexane, hexane, pentane, and ether, with critical gelation concentrations as low as 0.2, 0.5, 0.5, and 0.4% w/v
Macrocyclic Disulfides for Studies of Sensitized Photolysis of the SS Bond
作者:Zhen Huang、Qing-Zheng Yang、Timothy J. Kucharski、Daria Khvostichenko、Steven M. Wakeman、Roman Boulatov
DOI:10.1002/chem.200900521
日期:2009.5.18
Sensitized photolysis: We describe a series of macrocyclic disulfides containing stiff stilbene (see scheme) as the intramolecular photosensitizer designed for fundamental mechanistic studies of sensitized photolysis of the SS bond. Preliminary studies revealed weak temperature dependence of the quantum yields, which decreased exponentially with Boltzmann‐weighted average separation between the SS
Mechanochemical Regulation of Oxidative Addition to a Palladium(0) Bisphosphine Complex
作者:Liqi Wang、Yichen Yu、Anton O. Razgoniaev、Patricia N. Johnson、Chenxu Wang、Yancong Tian、Roman Boulatov、Stephen L. Craig、Ross A. Widenhoefer
DOI:10.1021/jacs.0c08506
日期:2020.10.14
bisphosphine ligand on the rate of oxidativeaddition of bromobenzene to a ligand-coordinated palladium center. Local compressive and tensile forces on the or-der of 100 pN were generated using a stiff stilbene force probe. A compressive force increases the rate of oxidativeaddition, whereas a tensile force decreases the rate, relative to that of the parent complex of strain-free ligand. Rates vary