Tunable Emissive Lanthanidomesogen Derived from a Room-Temperature Liquid-Crystalline Schiff-Base Ligand

2013 ◽  
Vol 19 (39) ◽  
pp. 13151-13159 ◽  
Author(s):  
Harun A. R. Pramanik ◽  
Gobinda Das ◽  
Chira R. Bhattacharjee ◽  
Pradip C. Paul ◽  
Paritosh Mondal ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Temperature Liquid

Bulk heterojunction photovoltaic cells based on room temperature liquid crystalline tetrathiafulvalene derivatives

2012 ◽  
Vol 39 (7) ◽  
pp. 795-801 ◽  
Author(s):  
Lei Wang ◽  
Soo-Yeon Park ◽  
Seong-Min Kim ◽  
Sora Yoon ◽  
Soo-Hyoung Lee ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Room Temperature ◽  
Bulk Heterojunction ◽  
Photovoltaic Cells ◽  
Temperature Liquid

scholarly journals Fluorescence, Biological Activity and Spectroscopic Studies of Azo-linked Schiff Base Ligand Type (ONO) and Its Complexes with CrIII, CoII NiII and CdII Ions

2017 ◽  
Vol 30 (3) ◽  
pp. 114
Author(s):  
Hasan A. Hasan
Keyword(s):  
Biological Activity ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Room Temperature ◽  
Diazonium Salt ◽  
Chloride Content ◽  
Spectroscopic Studies ◽  
Ligand Type ◽  
Tridentate Schiff Base ◽  
Complex Thermal Analysis

 The precursor [W] [2-(2-(naphthalen-5-yl) diazenyl)-4-amino-3-hydroxynaphthalene-1sulfonic acid] was synthesized from reaction of diazonium salt with 1-amino-2-naphtol-4sulfonic acid. Then the tridentate Schiff base ligand type ONO was synthesized from the reaction of the precursor with salicyaldehyde in 1:1 mole ratio to produce the ligand H2L [2-(2-(naphthalen5-yl) diazenyl)-4-(2-hydroxynaphthalen-3-yl)methyleneamino)-3-hydroxy salicyalene-1-sulfonic acid],the reaction achieved in methanol as a solvent under reflux. Spectroscopic methods IR, U.V, 1H,13C-NMR was used to characterize the ligand. Complexes of [CrIII, CoII, NiII and CdII] ions were also prepared through reaction of ligand with metal salts in 2:1 mole ratio at reflux, using KOH as a base, ethanol as a solvent. Chloride content, molar conductivity and melting point measurements along with I.R and U.V-Vis, atomic absorption (A.A) spectroscopy were used to characterize the complexes.1H-NMR spectroscopy was used to characterize Cd complex. Thermal analysis was used to insure the presence of crystallized H2O molecule in the complexes structure. The following formula was proposed for Cr complex: K[Cr(L)2]. H2O, while CoII, NiII and CdII complexes have the K2[M(L)2].H2O formula. The biological activity of the prepared compounds was studied. Fluorescence properties of the prepared compounds were studied (at room temperature) which indicate that the ligand may behave as strong fluorescent emitter. The complexes also showed fluorescence characteristic with the ligand. The ligand revealed high relative intensity and its fluorescence peak were also shifted to the lower or higher wavelength when compared with the complexes.

Room temperature liquid crystalline perylene diester benzimidazoles with extended absorption

2010 ◽  
Vol 20 (39) ◽  
pp. 8646 ◽  
Author(s):  
André Wicklein ◽  
Mathis-Andreas Muth ◽  
Mukundan Thelakkat
Keyword(s):  
Liquid Crystalline ◽  
Room Temperature ◽  
Temperature Liquid

scholarly journals From 1,4-Phenylenebis(phenylmaleate) to a Room-Temperature Liquid-Crystalline Benzo[ghi ]perylene Diimide

ChemPlusChem ◽  
2016 ◽  
Vol 82 (3) ◽  
pp. 342-346 ◽  
Author(s):  
Marília Gabriela Belarmino Cabral ◽  
Deise Maria Pereira de Oliveira Santos ◽  
Rodrigo Cristiano ◽  
Hugo Gallardo ◽  
Ahmed Bentaleb ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Room Temperature ◽  
Perylene Diimide ◽  
Temperature Liquid

Steric Trapping of the High Spin State in FeIII Quinolylsalicylaldimine Complexes

2014 ◽  
Vol 67 (11) ◽  
pp. 1574 ◽  
Author(s):  
Darunee Sertphon ◽  
David J. Harding ◽  
Phimphaka Harding ◽  
Keith S. Murray ◽  
Boujemaa Moubaraki ◽  
...  
Keyword(s):  
Schiff Base ◽  
Electronic Properties ◽  
High Spin ◽  
Spin State ◽  
Schiff Base Ligand ◽  
Room Temperature ◽  
Spin Crossover ◽  
High Spin State ◽  
Electrochemical Studies ◽  
Magnetic Studies

A new sterically bulky Schiff base ligand, N-(8-quinolyl)-5-tert-butylsalicylaldimine (Hqsal-5-tBu) has been prepared and a series of FeIII complexes, [Fe(qsal-5-tBu)2]Y (Y = Cl 1, ClO4 2, NO3 3, BF4 4) utilising this ligand are reported and fully characterised. UV-vis spectroscopic and electrochemical studies indicate that 1–4 are high spin (HS) in solution at room temperature and further suggest that the tBu group only slightly alters the electronic properties of 1–4 compared with related [Fe(qsal-5-X)2]+ systems. The structures of [Fe(qsal-5-tBu)2]Cl·4MeOH·H2O 1, [Fe(qsal-5-tBu)2]ClO4·MeOH 2, and [Fe(qsal-5-tBu)2]NO3 3 determined at 100 K reveal HS FeIII centres in all cases. Four-fold parallel aryl embraces and π–π interactions serve to link the cations forming 2D sheets mirroring the motifs found in other [Fe(qsal-5-X)2]+ complexes. Despite this the tBu group causes strong distortions at the Fe centre which as magnetic studies reveal prevent spin crossover trapping 1–4 in the HS state.

A Room-Temperature Liquid-Crystalline Phase with Crystalline π Stacks

2007 ◽  
Vol 119 (21) ◽  
pp. 3970-3973 ◽  
Author(s):  
Yijin Xu ◽  
Siwei Leng ◽  
Chenming Xue ◽  
Runkun Sun ◽  
Jie Pan ◽  
...  
Keyword(s):  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Liquid Crystalline Phase ◽  
Temperature Liquid
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