Effect of the Addition of a Fused Donor−Acceptor Ligand on a Ru(II) Complex: Synthesis, Characterization, and Photoinduced Electron Transfer Reactions of [Ru(TTF-dppz)<sub>2</sub>(Aqphen)]<sup>2+</sup>
The synthesis and the photophysical properties of the complex [Ru(TTF-dppz)2(Aqphen)]2+ (TTF = tetrathiafulvalene, dppz = dipyrido-[3,2-a:2′,3′-c]phenazine, Aqphen = anthraquinone fused to phenanthroline via a pyrazine bridge) are described. In this molecular triad excitation into the metal−ligand charge transfer bands results in the creation of a long-lived charge separated state with TTF acting as
复合物[Ru(TTF-dppz)2(Aqphen)] 2+(TTF =四硫富瓦烯,dppz =二吡啶基-[3,2- a:2',3'- c ]吩嗪,Aqphen的合成及光物理性质(描述了通过吡嗪桥与菲咯啉稠合的蒽醌)。在此分子三合会激发到金属-配体的电荷转移带中,导致长寿命的电荷分离态的产生,TTF充当电子给体,蒽醌充当末端受体。室温下,电荷分离态的寿命在二氯甲烷中为400 ns。基于瞬态吸收光谱,提出了一种涉及中间电荷分离态的电荷分离机理。
A Novel TTF-based Electron-donor with Imidazole-annelation Having Hydrogen-bonding and Proton-transfer Abilities
A TTF derivative with an imidazole-annelation having hydrogen-bond and proton-donor/acceptor abilities was newly synthesized. The donor formed a two-dimensional structure by hydrogen-bonds and π stacks in the crystal. The imidazole-annelation increased the electron-donating ability of the donor.
selective formation of 2+2 macrocycle 1 from 2,5-bis(3-formyl-2-hydroxyphenyl)-1,3,4-oxadiazole and a diamine-functionalized tetrathiafulvalene derivative is reported. Its electronic properties have been studied experimentally by the combination of electrochemistry and UV–vis–NIR spectroscopy. Particularly, its largely extended π-conjugation renders this novel macrocycle simultaneously a good multielectron
Chemical control of photoinduced charge-transfer direction in a tetrathiafulvalene-fused dipyrrolylquinoxaline difluoroborate dyad
作者:Ping Zhou、Ulrich Aschauer、Silvio Decurtins、Thomas Feurer、Robert Häner、Shi-Xia Liu
DOI:10.1039/d0cc05736c
日期:——
A new approach for a compact annulation of tetrathiafulvalene (TTF) and dipyrrolylquinoxaline difluoroborate (QB) is presented, leading to strong electronic interactions between the TTF and QB units. Regulation of distinct photoinduced charge flows within this dyad is achieved by external stimuli, which is also verified by TD-DFT calculations.
Tetrathiafulvalene diindolylquinoxaline: a dual signaling anion receptor with phosphate selectivity
作者:Christopher Bejger、Jung Su Park、Eric S. Silver、Jonathan L. Sessler
DOI:10.1039/c0cc02934c
日期:——
Incorporation of tetrathiafulvalene into the backbone of a known neutral phosphate receptor, diindolylquinoxaline, yields a dual optical-electrochemical chemosensor for dihydrogen phosphate that functions in dichloromethane. This system shows selectivity for dihydrogen phosphate over other small anions and can be used to detect the presence of this analyte via fluorescence quenching or cyclic voltammetry.