Novel photochromic polymer films containing ion-pair charge-transfer complexes of 4,4′-bipyridinium ions for optical recording

1991 ◽  
pp. 72-74 ◽  
Author(s):  
Toshihiko Nagamura ◽  
Yuji Isoda
Keyword(s):  
Charge Transfer ◽  
Polymer Films ◽  
Ion Pair ◽  
Optical Recording ◽  
Charge Transfer Complexes ◽  
Photochromic Polymer

Optical waveguide studies on photoinduced electrochromism in ultrathin films of ion-pair charge-transfer complexes of 4,4′-bipyridinium ions

1994 ◽  
Vol 243 (1-2) ◽  
pp. 660-663 ◽  
Author(s):  
Toshihiko Nagamura ◽  
Hiroshi Sakaguchi ◽  
Kyoichi Sasaki ◽  
Chihiro Mochizuki ◽  
Kuniyuki Suzuki
Keyword(s):  
Charge Transfer ◽  
Optical Waveguide ◽  
Ultrathin Films ◽  
Ion Pair ◽  
Charge Transfer Complexes

Ion-pair charge transfer complexes with intense near IR absorption: Syntheses, crystal structures, electronic spectra and DFT calculations

Polyhedron ◽  
2008 ◽  
Vol 27 (13) ◽  
pp. 2833-2844 ◽  
Author(s):  
Bing-Qian Yao ◽  
Jia-Sen Sun ◽  
Zheng-Fang Tian ◽  
Xiao-Ming Ren ◽  
Da-Wei Gu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Dft Calculations ◽  
Crystal Structures ◽  
Electronic Spectra ◽  
Ion Pair ◽  
Charge Transfer Complexes ◽  
Ir Absorption ◽  
Near Ir

scholarly journals Utility of Charge Transfer and Ion-Pair Complexation for Spectrophotometric Determination of Eletriptan Hydrobromide in Pure and Dosage Forms

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ayman A. Gouda ◽  
Ragaa El Sheikh ◽  
Rham M. El-Azzazy
Keyword(s):  
Charge Transfer ◽  
Correlation Coefficients ◽  
Standard Addition ◽  
Molar Absorptivity ◽  
Dosage Forms ◽  
Ion Pair ◽  
Charge Transfer Complexes ◽  
Alizarin Red ◽  
Relative Standard

Three simple, sensitive, and accurate spectrophotometric methods have been developed for the determination of eletriptan hydrobromide (ELT) in pure and dosage forms. The first two methods are based on charge transfer complex formation between ELT and chromogenic reagents quinalizarin (Quinz) and alizarin red S (ARS) producing charge transfer complexes which showed an absorption maximum at 569 and 533 nm for Quinz and ARS, respectively. The third method is based on the formation of ion-pair complex between ELT with molybdenum(V)-thiocyanate inorganic complex in hydrochloric acid medium followed by extraction of the colored ion-pair with dichloromethane and measured at 470 nm. Different variables affecting the reactions were studied and optimized. Beer's law is obeyed in the concentration ranges 2.0–18, 1.0–8.0, and 2.0–32 μg mL−1for Quinz, ARS, and Mo(V)-thiocyanate, respectively. The molar absorptivity, Sandell sensitivity, detection, and quantification limits are also calculated. The correlation coefficients were ≥0.9994 with a relative standard deviation (R.S.D%.) of ≤0.925. The proposed methods were successfully applied for simultaneous determination of ELT in tablets with good accuracy and precision and without interferences from common additives, and the validity is assessed by applying the standard addition technique, which is compared with those obtained using the reported method.

Ion Pair Charge-Transfer Complexes between Anionic and Cationic Metal-Dithiolenes [M(II) = Pd, Pt]

2002 ◽  
Vol 41 (20) ◽  
pp. 5241-5248 ◽  
Author(s):  
Francesco Bigoli ◽  
Paola Deplano ◽  
Maria Laura Mercuri ◽  
Maria Angela Pellinghelli ◽  
Luca Pilia ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Ion Pair ◽  
Charge Transfer Complexes ◽  
Metal Dithiolenes
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