Amphiphilic Alternating Carbazole Copolymers: Photophysical Properties of Poly[N-vinylcarbazxole-alt-citraconic acid] in Aqueous Solution

1994 ◽  
Vol 27 (6) ◽  
pp. 1434-1439 ◽  
Author(s):  
Yoshihiro Itoh ◽  
Hideto Satoh ◽  
Tadao Yasue ◽  
Akira Hachimori ◽  
Hiroshi Satozono ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties

scholarly journals Spectral properties and photophysical behaviour of water soluble cationic Mg(II) and Al(III) phthalocyanines

2014 ◽  
Vol 12 (3) ◽  
pp. 403-415 ◽  
Author(s):  
Mopelola Idowu ◽  
Yasin Arslanoğlu ◽  
Tebello Nyokong
Keyword(s):  
Aqueous Solution ◽  
Aqueous Medium ◽  
Spectral Properties ◽  
Photophysical Properties ◽  
Strong Dependence ◽  
Water Soluble ◽  
Quantum Yields ◽  
Fluorescence Lifetimes ◽  
High Solubility ◽  
Medium Ph

AbstractPeripherally and non-peripherally tetrasubstituted-[(N-methyl-2-pyridylthio)]phthalocyaninato magnesium (II) (5 and 6) and chloro aluminium (III) (7 and 8) tetraiodide have been synthesized and characterized. The photophysical properties of the complexes in dimethyl sulfoxide (DMSO) and aqueous medium in the presence and absence of cremophore EL have been studied. These complexes show high solubility in aqueous medium though they were aggregated. The triplet state quantum yields (FT) and the triplet lifetimes (tT) were found to be higher in DMSO with ΦT ranging from 0.32 to 0.51, while tT ranged from 282 to 622 ms in DMSO, compared to aqueous medium (pH 7.4 buffer) where ΦT ranged from 0.15 to 0.19 and tT from 26 to 35 ms. Addition of cremophore EL in aqueous solution resulted in partial disaggregation and increased photoactivity. The fluorescence lifetimes of the complexes showed strong dependence on their immediate environment. The ionic magnesium(II) and aluminium(III) phthalocyanines strongly bind to bovine serum albumin (BSA).

scholarly journals New Nile Blue Derivatives as NIR Fluorescent Probes and Antifungal Agents

Proceedings ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 65
Author(s):  
Rui P. C. L. Sousa ◽  
João C. C. Ferreira ◽  
Maria João M. F. Sousa ◽  
M. Sameiro T. Gonçalves
Keyword(s):  
Aqueous Solution ◽  
Antifungal Activity ◽  
Fluorescent Probes ◽  
Antifungal Agents ◽  
Nile Blue ◽  
Photophysical Properties

The synthesis of four new Nile Blue derivatives with hydrogen, propyl and/or aminopropyl groups as substituents of the amines of 5- and 9-positions is described. Photophysical properties were evaluated in acidified ethanol and aqueous solution at physiological pH. Antifungal activity is also studied through the obtention of MIC values.

Design, synthesis and photophysical properties of 8-hydroxyquinoline-functionalized tripodal molecular switch as a highly selective sequential pH sensor in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16207-16222 ◽  
Author(s):  
Rifat Akbar ◽  
Minati Baral ◽  
B. K. Kanungo
Keyword(s):  
Aqueous Solution ◽  
Dft Calculation ◽  
Photophysical Properties ◽  
Ph Sensor ◽  
Molecular Switch ◽  
Design Synthesis ◽  
Potential Applications

TAME5OX can act as a good candidate with potential applications in chemical and biological fields. Fluorescence reduction due to ESIPT between protonated NH+ ∼ –OH and deprotonated N ∼ –O− forms was proven by DFT calculation.

Photophysical properties of gatifloxacin in aqueous solution by laser flash photolysis and pulse radiolysis

2012 ◽  
Vol 81 (1) ◽  
pp. 40-45 ◽  
Author(s):  
Haixia Li ◽  
Peng Zhang ◽  
Yancheng Liu ◽  
Ruizhi Tang ◽  
Zhaoguo Xing ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Pulse Radiolysis ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Photophysical Properties ◽  
Laser Flash

Synthesis and photophysical properties of water-soluble dendrimers bearing a phthalocyanine core

2007 ◽  
Vol 11 (06) ◽  
pp. 448-454 ◽  
Author(s):  
Masakazu Nishida ◽  
Atsuya Momotake ◽  
Yoshihiro Shinohara ◽  
Yoshinobu Nishimura ◽  
Tatsuo Arai
Keyword(s):  
Aqueous Solution ◽  
Second Generation ◽  
Photophysical Properties ◽  
Dendritic Structure ◽  
Spectroscopic Measurement ◽  
Water Soluble ◽  
Aggregation Behaviors ◽  
First And Second Generation ◽  
Deactivation Process ◽  
Self Aggregation

Aggregation behaviors of phthalocyanine derivatives which have a dendritic structure were examined in an aqueous solution. We prepared the first- and second-generation dendrimers (WG1-PC and WG2-PC), having water-soluble substituents as a peripheral group, to be resolved in water. From spectroscopic measurement, WG2-PC acted in a monomeric manner, even in an aqueous solution, in contrast to WG1-PC, which exhibited spectra attributed to aggregation. This implies that a higher generation of water-soluble dendrimers can prevent a phthalocyanine core from forming an aggregation. The introduction of the second-generation dendrons to an aggregatable core may be effective to avoid self-aggregation and an undesirable deactivation process.

Photophysical Properties of Rufloxacin in Neutral Aqueous Solution

1999 ◽  
Vol 70 (5) ◽  
pp. 731-736 ◽  
Author(s):  
Salvatore Sortino ◽  
Giancarlo Marconi ◽  
Salvatore Giuffrida ◽  
Guido De Guidi ◽  
Sandra Monti
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties ◽  
Neutral Aqueous Solution

Guanidine Substitutions in Naphthyl Systems to Allow a Controlled Excited-State Intermolecular Proton Transfer: Tuning Photophysical Properties in Aqueous Solution

2018 ◽  
Vol 122 (17) ◽  
pp. 9363-9373 ◽  
Author(s):  
Pedro J. Pacheco-Liñán ◽  
Jesús Fernández-Sainz ◽  
Iván Bravo ◽  
Andrés Garzón-Ruiz ◽  
Carlos Alonso-Moreno ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Proton Transfer ◽  
Photophysical Properties ◽  
Intermolecular Proton Transfer

Effects of Ligand Geometry on the Photophysical Properties of Photoluminescent Eu(III) and Sm(III) 1-Hydroxypyridin-2-one Complexes in Aqueous Solution

2015 ◽  
Vol 55 (1) ◽  
pp. 114-124 ◽  
Author(s):  
Lena J. Daumann ◽  
David S. Tatum ◽  
Christopher M. Andolina ◽  
Joseph I. Pacold ◽  
Anthony D’Aléo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties

Synthesis, photophysical properties, and cyanide detection in aqueous solution of BF2-curcumin dyes

Tetrahedron ◽  
2010 ◽  
Vol 66 (32) ◽  
pp. 6217-6223 ◽  
Author(s):  
Anusak Chaicham ◽  
Sirinan Kulchat ◽  
Gamolwan Tumcharern ◽  
Thawatchai Tuntulani ◽  
Boosayarat Tomapatanaget
Keyword(s):  
Aqueous Solution ◽  
Photophysical Properties

Photophysics of Ochratoxin A in Aqueous Solution

2008 ◽  
Vol 63 (11) ◽  
pp. 1321-1326 ◽  
Author(s):  
Dörte Steinbrück ◽  
Claudia Rasch ◽  
Michael U. Kumke
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Ochratoxin A ◽  
Photophysical Properties ◽  
Proton Transfer Reaction ◽  
Transfer Reactions ◽  
Back Reaction ◽  
Experimental Conditions ◽  
Fluorescence Measurements ◽  
Proton Transfer Reactions

Abstract The photophysics of Ochratoxin A (OTA) in aqueous solution strongly depends on the pH. Due to its molecular structure OTA is prone to an excited state proton transfer reaction, which rules the photophysical properties. Based on results of absorption and fluorescence measurements the rate constants of the proton transfer reactions (forward and back reaction) were determined and subsequently, the pK*a value was calculated. Based on the results, optimized experimental conditions for the analysis can be determined e. solvent conditions (HPLC chromatography) or excitation and emission wavelength (fluorescence spectroscopy).

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