Origin of the temperature dependence of the rate of singlet energy transfer in a three-component truxene-bridged dyads
作者:Adam Langlois、Hai-Jun Xu、Bertrand Brizet、Franck Denat、Jean-Michel Barbe、Claude P. Gros、Pierre D. Harvey
DOI:10.1142/s1088424613501150
日期:2014.1
parameters affecting the rate for singletenergytransfer according to a Förster Resonance EnergyTransfer are only weakly temperature dependent, leaving only the Dexter mechanism explaining the larger variation in rate of energytransfers with the temperature hence providing a circumstantial evidence for a dual mechanism (Föster and Dexter) in truxene-based dyads (or polyads) in the S1 excited states
我们报告了一个基于 truxene 的二元体,该二元体建立在一个供体(三间苯锌(II)卟啉)和两个受体(八-β-烷基卟啉游离碱)上,其中供体围绕 C 自由旋转特鲁克烯-C中观在流体溶液中在 298 K 时单键,但在玻璃基质中在 77 K 时没有单键,而受体的运动非常有限,因为它们被 β-甲基基团阻挡。这种情况很有趣,因为根据 Förster 共振能量转移影响单重态能量转移速率的所有结构和光谱参数仅与温度有微弱的关系,只剩下 Dexter 机制解释了能量转移速率随温度的较大变化,因此提供在 S1激发态。
Excited State N−H Tautomer Selectivity in the Singlet Energy Transfer of a Zinc(II)-Porphyrin-Truxene-Corrole Assembly
作者:Adam Langlois、Hai-Jun Xu、Paul-Ludovic Karsenti、Claude P. Gros、Pierre D. Harvey
DOI:10.1002/chem.201605909
日期:2017.4.11
‐base corrole transfer (4.83×1010 s−1; 298 K), even faster than the tautomerization in the excitedstate processes taking advantage of the good electronic communication provided by the truxene bridge. Importantly, the energy transfer process shows approximately 3‐fold selectivity for one corrole N−H tautomer over the other even at low temperature (77 K). This selectivity is due to the difference in
报道了一种用于S 1能量转移的原始含coradol的多元体,其中一个锌(II)-卟啉供体通过一个二甲苯连接体连接到两个游离基corrole受体上。这种宝拉德具有快速的锌(II)-卟啉*→游离碱腐蚀(4.83×10 10 s -1 ; 298 K)转移,甚至比激发态过程中的互变异构更快,这要归功于其提供的良好电子通讯。特鲁克森大桥。重要的是,即使在低温(77 K)下,能量转移过程也显示出一种N-H互变异构体的选择性是另一种N-H互变异构体的大约3倍。这种选择性是由于J的差异集成在Förster和Dexter机制中均有效。数据通过DFT计算合理化。
Antenna effects in truxene-bridged BODIPY triarylzinc(<scp>ii</scp>)porphyrin dyads: evidence for a dual Dexter–Förster mechanism
作者:Hai-Jun Xu、Antoine Bonnot、Paul-Ludovic Karsenti、Adam Langlois、Mohammed Abdelhameed、Jean-Michel Barbe、Claude P. Gros、Pierre D. Harvey
DOI:10.1039/c3dt53630k
日期:——
BODIPY uses the truxene bridge to transfer its S1 energy to the zinc(ii)porphyrin acceptors via a Dexter mechanism almost exclusively.