GIANT ELECTROOPTIC EFFECT OF PORPHYRIN J-AGGREGATES IN POLYMER FILM AND IN AQUEOUS SOLUTION

J-Aggregates ◽  
2012 ◽  
pp. 213-246 ◽  
Author(s):  
Eiji Tokunaga ◽  
Kazuaki Nakata
Keyword(s):  
Aqueous Solution ◽  
Polymer Film ◽  
Electrooptic Effect ◽  
J Aggregates

Mechanism for giant electro-optic response of porphyrin J-aggregates in polymer film and aqueous solution

2010 ◽  
Vol 17 (3) ◽  
pp. 346-351 ◽  
Author(s):  
Kazuaki Nakata ◽  
Takayoshi Kobayashi ◽  
Eiji Tokunaga
Keyword(s):  
Aqueous Solution ◽  
Polymer Film ◽  
Electro Optic ◽  
J Aggregates

Near-IR absorbing J-aggregates of a phenanthrene-fused BODIPY as a highly efficient photothermal nanoagent

2020 ◽  
Vol 56 (93) ◽  
pp. 14709-14712
Author(s):  
Xing Guo ◽  
Mao Li ◽  
Hao Wu ◽  
Wanle Sheng ◽  
Yuanmei Feng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Highly Efficient ◽  
Near Ir ◽  
J Aggregates ◽  
Hydrocarbon Solution ◽  
Pure Hydrocarbon

A phenanthrene-[b]-fused BODIPY exhibited well-defined J-aggregates in both pure hydrocarbon solution and aqueous solution, and was developed as a highly efficient photothermal nanoagent.

Microstructure of indocyanine green J-aggregates in aqueous solution

2001 ◽  
Vol 269 (1-3) ◽  
pp. 399-409 ◽  
Author(s):  
J. Zweck ◽  
A. Penzkofer
Keyword(s):  
Aqueous Solution ◽  
Indocyanine Green ◽  
J Aggregates

scholarly journals J-Aggregates of Cyanine Dyes in Aqueous Solution of Polymers: A Quantitative Study

2004 ◽  
Vol 3 (3) ◽  
Author(s):  
Wesley Tillmann ◽  
Hussein Samha
Keyword(s):  
Aqueous Solution ◽  
Quantitative Study ◽  
Aggregation Number ◽  
Cyanine Dyes ◽  
Cyanine Dye ◽  
Isosbestic Point ◽  
Maximum Capacity ◽  
Vis Spectroscopy ◽  
J Aggregates

The effect of polyvinylsulfate (PVS) on the spectroscopy of the cyanine dye, 1,1’-diethyl-2,2’-cyanine iodide (PIC), has been investigated using UV-vis spectroscopy. J-aggregates of the PIC dye were formed upon addition of PVS to the monomers of the dye in solution. The appearance of only one isosbestic point in the UV-vis spectra suggests that the dye monomers are quantitatively converted to J-aggregates and equilibrium was reached. Using Benisi-Hildebrand kinetics, aggregation number of 4 was calculated for the dye. In addition, a 1:2 mole ratio of PIC/PVS was calculated at the maximum capacity of the polymer.

scholarly journals Controlled Formation of the Two-Dimensional TTBC J-Aggregates in an Aqueous Solution

2006 ◽  
Vol 110 (22) ◽  
pp. 10805-10813 ◽  
Author(s):  
Burak Birkan ◽  
Demet Gülen ◽  
Serdar Özçelik
Keyword(s):  
Aqueous Solution ◽  
Two Dimensional ◽  
J Aggregates

scholarly journals Aggregation of Cyanine Dye in Bilayer Vesicles of Phospholipids

2005 ◽  
Vol 4 (3) ◽  
Author(s):  
Casey McCullough ◽  
Matthew Heywood ◽  
Hussein Samha
Keyword(s):  
Aqueous Solution ◽  
Equilibrium Constant ◽  
Room Temperature ◽  
Aggregation Number ◽  
Cyanine Dye ◽  
Molar Ratio ◽  
Isosbestic Point ◽  
Dye Molecules ◽  
Vis Spectroscopy ◽  
J Aggregates

The effect of phospholipid, 1,2-Dipalmitoyl-sn-glycero-3-Phosphocholine (DPPC) on the spectroscopy of the cyanine dye, 1-ethyl-1’-octadecyl-2,2’-cyanine iodide (PIC-18), has been investigated using UV-Vis spectroscopy. Vesicles of DPPC containing PIC-18 in the molar ratio of 1:3 (dye/phospholipids) were prepared in aqueous solution. J-aggregates of PIC-18 were detected in the bilayer wall of the vesicles. When an aqueous solution of mixed PIC-18/DPPC vesicles is treated with excess DPPC vesicles that are prepared separately, the dye molecules in the mixed vesicles underwent a rapid (aggregate)n' n(monomer) equilibrium as the appearance of only one isosbestic point in the absorbance of the dye indicates. The equilibrium constant was calculated at room temperature (Keq = 6.7x10-2). An aggregation number of 4 was calculated for the dye in the bilayer vesicles.

scholarly journals Molecular Distribution Behavior of Cyanine Dyes in Aqueous Solution

2009 ◽  
Vol 7 (4) ◽  
Author(s):  
David Baumann ◽  
Bryan Clark ◽  
Jared Garlick ◽  
Hussein Samha
Keyword(s):  
Aqueous Solution ◽  
Narrow Band ◽  
Ammonium Phosphate ◽  
Emission Spectra ◽  
Cyanine Dye ◽  
Concentrated Solutions ◽  
Molecular Distribution ◽  
J Aggregates ◽  
Absorption And Emission Spectroscopy ◽  
Distribution Behavior

The molecular distribution of the cyanine dye (5-chloro-2-[3-[5-chloro-3-(4-sulfobutyl)-2(3H)-benzothiazolylidine]-1-propenyl]-3-(4-sulfobutyl)-benzothiazolium hydroxide triethylamine salt, NK-3796) in aqueous solution was investigated using absorption and emission spectroscopy. Dimers of the dye are formed in concentrated solutions, while monomers dominate more diluted solutions. J aggregates are formed in solutions containing electrolytes such as sodium chloride, calcium chloride, and di-hydrogen ammonium phosphate. The dye readily forms J aggregates upon mixing with electrolyte. The J aggregates formation was followed spectroscopically by the appearance of a red-shifted narrow band centered at 653 nm in the absorption spectra. A similar shift is also observed in the emission spectra. The absorbance bandwidth is dependent on the charge of the cation of the electrolyte. This suggests different ground-state conformations for the J aggregates in solution.

scholarly journals Absorption of Iodine by Polymers and Electrochemical Response of Polymer Film in Aqueous Solution of Iodine

1989 ◽  
Vol 21 (5) ◽  
pp. 403-408 ◽  
Author(s):  
Hiroshi Sukawa ◽  
Yukihiro Yoda ◽  
Hirotsugu Sugimoto ◽  
Shunji Yoshida ◽  
Takakazu Yamamoto ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Polymer Film ◽  
Electrochemical Response
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