作者:Tao Lu、Xiaofei Yang、Xiao-Yan Wang、Ziyong Li、Jun Yin、Sheng Hua Liu
DOI:10.1016/j.dyepig.2020.108933
日期:2021.2
Moreover, investigation on photochromic properties indicated that these complexes had good photochromic behavior upon irradiation with UV (302 nm) and green light (530 nm). And the effect of terminal ligands on photochromic properties of these gold(I) complexes was observed. Surprisingly, they displayed an unusual “turn-on” fluorescent switching behavior upon irradiation with UV light, which was mainly attributed
对于在光响应光电领域的潜在应用,非常需要开发基于二噻吩乙烯的新型光致变色配合物。在此贡献中,通过在二噻吩基乙烯单元的末端附加炔基-金(I)-异氰酸酯三单元组,设计并制备了四个新颖的二噻吩基乙烯桥联的金(I)异氰酸酯络合物1a-1d。它们被充分表征并通过1 H NMR证实,13C NMR和HRMS(MALDI)。此外,对光致变色性质的研究表明,这些复合物在用紫外线(302nm)和绿光(530nm)照射时具有良好的光致变色行为。并观察到末端配体对这些金(I)配合物的光致变色性能的影响。出乎意料的是,它们在用紫外线照射时显示出异常的“开启”荧光转换行为,这主要归因于通过TD-DFT计算得出这些配合物的闭环异构体的LMCT(配体至金属的电荷转移)。因此,这些配合物可以用作智能光电材料中潜在的荧光开关。
An adjustable pyrene/diarylethene-based bistable [3]rotaxane driven by acid-base has been successfully developed through “threading-followed-by-stoppering” strategy, exhibiting adjustable photochromic characteristic and tunable fluorescence photoswitching behavior. In this system, the shuttling motion of two macrocyclic host along the axle with four recognition sites effectively controls the distance
Adjustable Photochromic Behavior of a Diarylethene-Based Bistable [3]Rotaxane
作者:Guoxing Liu、Jing Zhu、Yu Zhou、Zhenhua Dong、Xiufang Xu、Pu Mao
DOI:10.1021/acs.orglett.8b02293
日期:2018.9.21
diarylethene-based bistable [3]rotaxane has been constructed through a threading-stoppering method, manifesting a reversible shuttling motion undergoing acid–base stimulation. In this system, two macrocycles can be driven to unfasten or restrict the photoswitchable framework by addition of the appropriate acid or base, revealing that photocyclization quantum yield of the [3]rotaxane in the “Near” state is
A multi-stimuli responsive organogel based on a tetrapeptide–dithienylcyclopentene conjugate
作者:Yi Jiang、Fei Zeng、Ruiying Gong、Zongxia Guo、Chuan-Feng Chen、Xiaobo Wan
DOI:10.1039/c3sm51052b
日期:——
anti-parallel β-sheets of the biomimetictetrapeptides is the key driving force. Further studies suggest that the organogel is multi-responsive to various external stimuli including temperature, light, chemicals, and mechanical force. Moreover, in the presence of catechol, this gelator forms a more robust organogel, accompanied by a dramatic change of the assembly manner and rheological properties. These
Syntheses and Properties of Binuclear Ruthenium Vinyl Complexes with Dithienylethene Units as Multifunction Switches
作者:Yan Lin、Jingjing Yuan、Ming Hu、Jie Cheng、Jun Yin、Shan Jin、Sheng Hua Liu
DOI:10.1021/om900396b
日期:2009.11.23
A series of binuclear ruthenium vinyl complexes with dithienylethene units, [RuCl(CO)(PMe3)(3)](2)-(mu-CH=CH-DTE-CH=CH) (5a, 5b), [RuCl(CO)(Py)(PPh3)(2)](2) (mu-CH=CH-DTE-CH=CH) (6a, 6b), [RuTp(CO)(PPh3)](2) (mu-CH=CH-DTE-CH=CH) (7a, 7b), and [RuCl(CO)(PMP)](2)(mu-CH=CH-DTE-CH=CH) (8a, 8b) (DTE = 1,2-bis(2-methylthiophen-3-yl)cyclopentene; 1,2-bis(2-methylthiophen-3-yl)-3,3,4,4,5,5-hexafluorocyclopentene), have been prepared. The respective products have been characterized by elemental analyses, NMR spectrometry, and UV/vis spectrophotometry. The structures of 3a and 5b have been established by X-ray crystallography. It is revealed that the binuclear ruthenium vinyl complexes with dithienylethene units show photochromic behavior, but their absorption spectra, cyclization/cycloreversion quantum yields, and the efficiency of the photochromic process are highly dependent on the central switching units and the ancillary ligands attached to the metal. Electrochemical studies have shown that the open-ring isomers of the metal complexes are triggered, either by light or electricity, to convert to their closed forms. It has clearly been demonstrated that these complexes represent it class of light- and electrotriggered multifunctional switch molecules featuring electrochromism, elcctrocyclization, and photo/electrotuning of the electronic communication.