scholarly journals Synthesis and characterization of Cu(II) complexes of proton transfer salts derived from piperazine derivatives and 5-sulfosalicylic acid

2021 ◽  
Vol 40 (2) ◽  
pp. 159
Author(s):  
Nurgün Büyükkıdan ◽  
Halil Ilkimen ◽  
Büşra Durmuş ◽  
Aysel Gülbandılar
Keyword(s):  
Proton Transfer ◽  
Synthesis And Characterization ◽  
Sulfosalicylic Acid ◽  
Piperazine Derivatives

Synthesis and Characterization of Rare Earth/Polyurethane Composite Material

2013 ◽  
Vol 763 ◽  
pp. 125-129
Author(s):  
Jie Lin Wang ◽  
Ying Li ◽  
Wei Chain ◽  
Xia Wang ◽  
Hua Ti Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Hybrid Material ◽  
Mesoporous Material ◽  
Organic Ligand ◽  
Synthesis And Characterization ◽  
Sulfosalicylic Acid ◽  
Polyurethane Composite ◽  
Characteristic Emission ◽  
Hybrid Precursor

The organic ligand sulfosalicylic acid (SSA) which was selected as molecular bridge for sensitization of terbium ions was modified by thionyl chloride (SOCl2) and 3-ammonium propyl triethoxy silane (APTES) to obtain the hybrid precursor SSA-Si. Then the solution of Tb (NO3)3was added in the presence of tetraethylorthosilicate (TEOS). The binary lanthanide organic/inorganic hybrid material was obtained. The ternary hybrid material was obtained by adding the solution of Tb (NO3)3and polyurethane. We investigated the thermal stability and luminescence properties of hybrids and found that the ternary hybrid materials exhibit better thermal stability and stronger emission intensity. Furthermore, compared with the binary mesoporous material Tb-(SSA-Si)3, the ternary mesoporous material Tb-(SSA-Si)3-PU exhibits the characteristic emission of the Tb3+ion with a higher luminescence intensity, suggesting that the introduction of polymer polyurethane into the mesoporous matrix is of benefit for the sensitization of Tb3+luminescence, by replacing H2O groups that can quench the luminescence of Tb3+ion.

Synthesis and characterization of excited state intramolecular proton transfer based 2-hydroxylaryl imidazole fluorescent materials

2012 ◽  
Vol 162 (1-2) ◽  
pp. 58-63 ◽  
Author(s):  
Aman Mahajan ◽  
Ramanpreet Kaur Aulakh ◽  
R.K. Bedi ◽  
Sandeep Kumar ◽  
Subodh Kumar ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Proton Transfer ◽  
Synthesis And Characterization ◽  
Fluorescent Materials

scholarly journals Synthesis and characterization of piperazine-substituted dihydrofuran derivatives viaMn(OAc)3 mediated radical cyclizations

2020 ◽  
Vol 44 (5) ◽  
pp. 1303-1313
Author(s):  
Sait SARI ◽  
Mehmet YILMAZ
Keyword(s):  
Synthesis And Characterization ◽  
Radical Cyclizations ◽  
Dicarbonyl Compounds ◽  
Piperazine Derivatives ◽  
High Yields ◽  
First Time

The aim of this study is to synthesize novel piperazine-containing dihydrofuran compounds (3a-n)from radical additions and cyclizations of diacyl and alkyl-acyl piperazine derivatives (1a-h) with 1,3-dicarbonyl compounds (2a-c) mediated by Mn(OAc)3 for the first time. From the reactions of 1a-c with dimedone (2a);1a, 1c, and 1d with acetylacetone (2b); and 1a with ethylacetoacetate(2c) ,the dihydrofuran-piperazine compounds 3a-c, 3d-f, and 3g were obtained in medium to high yields (31%–81%), respectively. In addition, dihydrofuran-piperazine compounds 3h-j and 3k-n were prepared at low to medium yields (20%–40%) from the reactions of 1e-g with 2a and 1e-h with 2c, respectively.

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