Synthesis and characterization of poly(N-propargylurea)s with helical conformation, optical activity and fluorescence properties

2010 ◽  
Vol 70 (2) ◽  
pp. 116-121 ◽  
Author(s):  
Xiaofeng Luo ◽  
Jie Chang ◽  
Jianping Deng ◽  
Wantai Yang
Keyword(s):  
Optical Activity ◽  
Fluorescence Properties ◽  
Helical Conformation ◽  
Synthesis And Characterization

Synthesis and characterization of 2,3-di-O-alkylated amyloses: Hydrophobic substitution destabilizes helical conformation

Biopolymers ◽  
2003 ◽  
Vol 69 (3) ◽  
pp. 301-310 ◽  
Author(s):  
Hans-Georg Breitinger
Keyword(s):  
Helical Conformation ◽  
Synthesis And Characterization

Synthesis and Characterization of Third Order Nonlinear Optical Materials

1989 ◽  
Vol 173 ◽  
Author(s):  
L. P. Yu ◽  
M. Chen ◽  
L. R. Dalton ◽  
X. F. Cao ◽  
J. P. Jiang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Optical Activity ◽  
Optical Materials ◽  
Nonlinear Optical ◽  
Four Wave Mixing ◽  
Nonlinear Optical Materials ◽  
Synthesis And Characterization ◽  
Wave Mixing ◽  
Third Order

ABSTRACTNew polymers incorporating a variety of electroactive moeities with defined π-electron conjugation lengths have been synthesized and characterized by degenerate four wave mixing (DFWM) techniques. The χ(3)/α values for these materials varied from 10−12 to 10−13 esu cm. This work has identified several promising structures with nonlinear optical activity including organometallic and purely organic materials. The preparation of composite materials has also permitted the measurement of χ(3)/α as a function of the electroactive unit concentration.

Synthesis and Characterization of Novel Amphiphilic Helical Copolymer

2011 ◽  
Vol 239-242 ◽  
pp. 1711-1716 ◽  
Author(s):  
Dong Mei Yue ◽  
Dong Zhao ◽  
Ting Yu ◽  
Wei Min Wang ◽  
Li Qun Zhang
Keyword(s):  
Polyethylene Glycol ◽  
Optical Activity ◽  
Monomethyl Ether ◽  
Synthesis And Characterization ◽  
Glycol Monomethyl Ether ◽  
Amplification Effect ◽  
Molecular Weights ◽  
Chiral Amplification ◽  
Environmental Stimulation

The new comb-copolymers [polyacetylene–MPEG (polyethylene glycol monomethyl ether)] were synthesized with (nbd)Rh+[η6-C6H5B- (C6H5)3] as catalyst. The copolymers with moderate molecular weights (Mn) (13000-170000) and yields (31.6-47.3%) exhibited higher optical activities compared with chiral monomer, which accorded with the “Chiral Amplification” effect. The optical activity of the copolymers gradually decreased as the amount of MPEG increased. The maximum amounts of MPEG for successful copolymerization and optical activity of copolymers were 40%, 30%, 20%(mol%) as the Mn of MPEG was 350, 750,1900, respectively. The optical activity of copolymers could change at external environmental stimulation, e.g., decreased as methanol content increased.

Synthesis and Characterization of Low-Dimensional Rare-Earth Phosphate Nanomaterials

2013 ◽  
Vol 320 ◽  
pp. 567-570
Author(s):  
Jie Yu ◽  
Hui Ying Chen ◽  
Jian Ping Yang ◽  
Xi Xi Wan ◽  
Shu Da Yu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fluorescence Properties ◽  
Synthesis And Characterization ◽  
Preparation Process ◽  
Emulsion System ◽  
Micro Emulsion ◽  
Rare Earth Phosphate ◽  
Size And Morphology ◽  
Low Dimensional

Several rare earth phosphate nanomaterials have been synthesized. It is shown that during the Micro emulsion preparation process, the size and morphology of rare earth phosphate nanomaterials could be tuned by changing the conditions of the micro emulsion system, which have a significant effect on the fluorescence properties.

Synthesis and Characterization of Poly(o-Methoxyaniline) Microsheets with pH-Sensitive Fluorescence Properties

2016 ◽  
Vol 703 ◽  
pp. 237-241
Author(s):  
Yan Feng Guo ◽  
Dong Hao Sun ◽  
Ying Wang
Keyword(s):  
Conventional Method ◽  
Fluorescence Properties ◽  
Polymerization Reaction ◽  
Synthesis And Characterization ◽  
Initial Reaction ◽  
Enhanced Fluorescence ◽  
Acidic Conditions ◽  
Ph Dependent ◽  
Light Green

Functional poly(o-methoxyaniline) (POMA) microsheets are successfully synthesized in the presence of (NH4)3[CoMo6O24H6]·7H2O (CoMo6) under acidic conditions. It is proposed that the light-green CoMo6 precipitates formed in the initial reaction systerm serve as a polymerization reaction template for the formation of POMA microsheets. Moreover, POMA microsheets show pH-dependent fluorescence and exhibit enhanced fluorescence properties in comparision with POMA synthesized by conventional method in the absence of CoMo6.

Synthesis and characterization of optically active copolymers of acenaphthylene. 2. Chiroptical and fluorescence properties

1983 ◽  
Vol 16 (4) ◽  
pp. 502-507 ◽  
Author(s):  
Giancarlo Galli ◽  
Roberto Solaro ◽  
Emo Chiellini ◽  
Alan Fernyhough ◽  
Anthony Ledwith
Keyword(s):  
Optically Active ◽  
Fluorescence Properties ◽  
Synthesis And Characterization
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