Photoswitchable azobenzene–rhodamine tweezers for biosensing of Al3+ ions

p-Phenylenediacrylic acid (p-PDA) displays excimeric emission in concentrated solutions (concentration ca. 0.5 M) in dimethylsulphoxide (DMSO). The excimeric emission maximum is red shifted by ca. 5200 cm–1 compared with molecular emission maximum. The fluorescence quantum yields of p-PDA has been measured in DMSO (φf = 0.09, λex = 337 nm) and in cetyltrimethylammonium chloride (CTAC) cationic micelles that show remarkable solubilization of p-PDA.The solution photoreactivity of p-PDA is wavelength dependent. In dilute DMSO solutions, 365 nm and 310 nm light causes p-PDA consumption giving a photoproduct of maximum absorption at ca. 265 n,. A back photoreaction is induced by 254 nm light. The photochemical quantum yields (φc) of the forward photochemical reaction have been measured as a function of temperature and the activation energy was evaluated as Ea = 9 kJ mol–1 suggesting a unimolecular photoisomerization process.Emission from crystalline p-PDA has also been reported. The emission maximum is red shifted from molecular emission maximum by ca. 3250 cm–1.The energy transfer in the system diethyl-p-phenylenediacrylate (p-PDAEt)-1,4-bis(β-pyridyl-2-vinyl)benzene(P2VB) has been studied. Triplet states formation mechanism is proposed.

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Electrochemical Studies on Photoactively Conducting Poly(4-aminoazobenzene) Coating: Electrochromic Property

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.650.98 ◽

2013 ◽

Vol 650 ◽

pp. 98-102 ◽

Cited By ~ 2

Author(s):

Hsiu Ying Huang ◽

Jui Chi Lin ◽

Jui Ming Yeh ◽

Yi Chen Chou

Keyword(s):

Absorption Spectra ◽

Oxidative Coupling ◽

Uv Absorption ◽

Electrochromic Property ◽

Cyclic Voltammogram ◽

Electrochemical Studies ◽

Electrochemical Investigation ◽

Uv Absorption Spectra ◽

Photoisomerization Process ◽

Coupling Polymerization

In this study, we present the first electrochemical investigation on the electrochromic property of poly (4-aminoazobenzene) coating prepared by oxidative coupling polymerization. A UV-vis spectrum was used to monitor the photoisomerization process of the polymer. At the same time, the electrochemical activity of the polymer was explored by cyclic voltammogram (CV) measurement, showing that the intrinsic electroactivity of the aniline structure was maintained in the polymer. Moreover, the electrochromic performance of the polymer was investigated by measuring electrochromic photographs and UV absorption spectra.

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Does the wavelength dependent photoisomerization process of the p‑coumaric acid come out from the electronic state dependent pathways?

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2018.12.010 ◽

2019 ◽

Vol 211 ◽

pp. 203-211 ◽

Cited By ~ 3

Author(s):

Li Zhao ◽

Jianyong Liu ◽

Panwang Zhou

Keyword(s):

Electronic State ◽

Coumaric Acid ◽

State Dependent ◽

Photoisomerization Process

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Abnormal Enhancement of the Photoisomerization Process in atrans-Nitroalkoxystilbene Dimer Sequestered in β-Cyclodextrin Cavities

The Journal of Physical Chemistry A ◽

10.1021/jp304852b ◽

2012 ◽

Vol 116 (42) ◽

pp. 10328-10337 ◽

Cited By ~ 7

Author(s):

Nelly Hobeika ◽

Jean-Pierre Malval ◽

Hélène Chaumeil ◽

Vincent Roucoules ◽

Fabrice Morlet-Savary ◽

...

Keyword(s):

Photoisomerization Process

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Excited-state dynamics simulation of the photoisomerization process of bacteriorhodopsin

Seibutsu Butsuri ◽

10.2142/biophys.40.s39_3 ◽

2000 ◽

Vol 40 (supplement) ◽

pp. S39

Author(s):

T. Yamato ◽

S. Yamamoto ◽

T. Kakitani

Keyword(s):

Excited State ◽

Dynamics Simulation ◽

Excited State Dynamics ◽

Photoisomerization Process

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Influences of Central Units and Terminal Chains on the Banana-Shaped Liquid Crystals

Crystals ◽

10.3390/cryst10100857 ◽

2020 ◽

Vol 10 (10) ◽

pp. 857

Author(s):

Tang Xin Ting ◽

Mohd Sani Sarjadi ◽

Md Lutfor Rahman

Keyword(s):

Liquid Crystals ◽

Data Storage ◽

Smart Materials ◽

Optical Data Storage ◽

Optical Data ◽

Display Devices ◽

Functionalized Materials ◽

Potential Applications ◽

The Impact ◽

Photoisomerization Process

Azo-functionalized materials are one of the appealing groups of the functionalized materials owing to their photoswitching behaviour and have been explored for various potential applications viz., optical data storage, sensor, display devices, nonlinear materials and molecular switches. Recently, azo-functionalized bent-core liquid crystals (BCLCs) have gained significant attention because they have dual properties of BCLCs and azobenzene, which enables to generate new multifaceted functional and smart materials. In this report, the recently synthesized azobenzene containing bent-core mesogens and its subclass, the so-called hockey stick and V-shaped molecules are summarized. The mesomorphic behaviour of reported BCLCs affected by the type of central core unit, the nature, number and position of the lateral substituents and the type and length of the terminal chain are discussed. The photoisomerization process of these photoresponsive BCLCs in solid, solution and mesophase, as well as the impact of light on the chemical and electrical properties of them, are discussed.

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