scholarly journals Synthesis and Optical Properties of Pentamethine Cyanine Dyes With Carboxylic Acid Moieties

2017 ◽  
Vol 12 ◽  
pp. 117739011771193 ◽  
Author(s):  
Tyler L Dost ◽  
Michael T Gressel ◽  
Maged Henary
Keyword(s):  
Optical Properties ◽  
Carboxylic Acid ◽  
Alkyl Chain ◽  
Cyanine Dyes ◽  
Metal Chelators ◽  
Molecular Models ◽  
Fields Of Study ◽  
Molecular Brightness ◽  
Chain Lengths ◽  
Pentamethine Cyanine Dyes

Cyanine dyes possessing carboxylic acid groups have been used in many different fields of study. The acid groups can act as handles for bioconjugation or as metal chelators. Several pentamethine cyanine dyes with propionic acid handles were synthesized and their optical properties were studied to determine their usefulness as fluorescent probes. The optical properties studies performed include the absorbance and emission maxima values as well as the calculation of quantum yield and molecular brightness levels. Molecular models were also calculated to help analyze the dyes’ behavior and were compared with similar dyes with varying alkyl chain lengths replacing the acid moieties.

scholarly journals Facile construction of a family of supramolecular gels with good levofloxacin hydrochloride loading capacity

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12641-12648
Author(s):  
Renyuan Chen ◽  
Caidie Xu ◽  
Yihao Lei ◽  
Hongxin Liu ◽  
Yabin Zhu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Alkyl Chain ◽  
Low Molecular Weight ◽  
Loading Capacity ◽  
Supramolecular Gels ◽  
Low Molecular Weight Gelators ◽  
Chain Lengths

A family of low molecular weight gelators with different alkyl chain lengths was constructed, having excellent gelation ability and antibiotic loading capacity. A low molecular weight hydrogelator was obtained by adjusting the length of alkyl chain.

scholarly journals Responsive Polyesters with Alkene and Carboxylic Acid Side-Groups for Tissue Engineering Applications

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1636
Author(s):  
Stella Afroditi Mountaki ◽  
Maria Kaliva ◽  
Konstantinos Loukelis ◽  
Maria Chatzinikolaidou ◽  
Maria Vamvakaki
Keyword(s):  
Carboxylic Acid ◽  
Chain Length ◽  
Main Chain ◽  
Alkyl Chain ◽  
Click Reaction ◽  
Irradiation Time ◽  
Alkyl Chain Length ◽  
Polymer Chains ◽  
Condensation Polymerization ◽  
L929 Fibroblast

Main chain polyesters have been extensively used in the biomedical field. Despite their many advantages, including biocompatibility, biodegradability, and others, these materials are rather inert and lack specific functionalities which will endow them with additional biological and responsive properties. In this work, novel pH-responsive main chain polyesters have been prepared by a conventional condensation polymerization of a vinyl functionalized diol with a diacid chloride, followed by a photo-induced thiol-ene click reaction to attach functional carboxylic acid side-groups along the polymer chains. Two different mercaptocarboxylic acids were employed, allowing to vary the alkyl chain length of the polymer pendant groups. Moreover, the degree of modification, and as a result, the carboxylic acid content of the polymers, was easily tuned by varying the irradiation time during the click reaction. Both these parameters, were shown to strongly influence the responsive behavior of the polyesters, which presented adjustable pKα values and water solubilities. Finally, the difunctional polyesters bearing the alkene and carboxylic acid functionalities enabled the preparation of cross-linked polyester films by chemically linking the pendant vinyl bonds on the polymer side groups. The biocompatibility of the cross-linked polymers films was assessed in L929 fibroblast cultures and showed that the cell viability, proliferation, and attachment were greatly promoted on the polyester surface, bearing the shorter alkyl chain length side groups and the higher fraction of carboxylic acid functionalities.

Nonlinear optical properties of cyanine dyes

1991 ◽  
Vol 179 (5-6) ◽  
pp. 551-554 ◽  
Author(s):  
Hidetsugu Ikeda ◽  
Toshio Sakai ◽  
Kenji Kawasaki
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Cyanine Dyes ◽  
Nonlinear Optical Properties

scholarly journals Optical properties of molecular nanocrystals consisting of J-aggregates of anionic and cationic cyanine dyes

2018 ◽  
Vol 26 (23) ◽  
pp. 30324 ◽  
Author(s):  
B. I. Shapiro ◽  
A. D. Nekrasov ◽  
V. S. Krivobok ◽  
V. S. Lebedev
Keyword(s):  
Optical Properties ◽  
Cyanine Dyes ◽  
J Aggregates
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