The role of chiral dopants in organic/inorganic hybrid materials containing chiral Schiff base Ni(II), Cu(II) and Zn(II) complexes

Polyhedron ◽  
2012 ◽  
Vol 31 (1) ◽  
pp. 278-284 ◽  
Author(s):  
Yoshikazu Aritake ◽  
Takashiro Akitsu
Keyword(s):  
Schiff Base ◽  
Hybrid Materials ◽  
Inorganic Hybrid ◽  
Chiral Schiff Base ◽  
Chiral Dopants

scholarly journals The Studies of Conditions for Inducing Chirality to Cu(II) Complexes by Chiral Zn(II) and Ni(II) Complexes with Schiff Base

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Takashiro Akitsu ◽  
Jun Yamaguchi ◽  
Naoki Uchida ◽  
Yoshikazu Aritake
Keyword(s):  
Schiff Base ◽  
Hybrid Materials ◽  
Dipole Moments ◽  
Model Systems ◽  
Electron Conductivity ◽  
The Novel ◽  
Cd Spectra ◽  
Test Conditions ◽  
Methanol Solutions ◽  
Chiral Schiff Base

Recently, we have discovered that some chiral Schiff-base nickel(II) complexes induced d-d bands of CD spectra of some achiral copper(II) complexes. However, the novel phenomenon could be observed only a few systems of hybrid materials or limited conditions so far. In order to test conditions about copper(II) ions, we investigated model systems (1) metal-dendrimer (Cu-PAMAM; G4-NH2terminal) containing relatively small amount of copper(II) ions (4.5 equivalent to PAMAM) for modeling separated systems of achiral copper(II) complex from chiral Schiff-base nickel(II) or zinc(II) complexes, Bis(N-R-1-naphtylethyl-3,5-dichlorosalicydenaminato)nickel(II) or zinc(II) by polymer matrix. (2) equilibrium of copper(II)N-ethylethylenediamine complexes to measure absorption spectra of d-d band, pH, and electron conductivity during titration of copper(II) ions. The results showed that (1) 4.5Cu-PAMAM could not be induced their d-d bands by the chiral nickel(II) or zinc(II) complexes, which suggested that separation by polymers prevented from inducing CD peaks. (2) Although 36Cu-PAMAM was known, uncoordinated copper(II) ions excess to ligands mainly attributed to increase electron conductivity by remained ions in methanol solutions, which was not associated with intermolecular interaction or dipole moments being effective for the induced CD mechanism by using molecular recognition between neutral molecules of metal complexes.

Polarized spectroscopy and hybrid materials of chiral Schiff base Ni(II), Cu(II), Zn(II) complexes with included or separated azo-groups

Polyhedron ◽  
2011 ◽  
Vol 30 (5) ◽  
pp. 886-894 ◽  
Author(s):  
Yoshikazu Aritake ◽  
Tsubasa Takanashi ◽  
Atsuo Yamazaki ◽  
Takashiro Akitsu
Keyword(s):  
Schiff Base ◽  
Hybrid Materials ◽  
Polarized Spectroscopy ◽  
Chiral Schiff Base

UV Curable Organic-Inorganic Hybrid Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Guang-Way Jang ◽  
Ren-Jye Wu ◽  
Yuung-Ching Sheen ◽  
Ya-Hui Lin ◽  
Chi-Jung Chang
Keyword(s):  
Hybrid Materials ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Solution Ph ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Degradation Temperature ◽  
Sol Gel Process ◽  
The Stability ◽  
Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

Ecosustainable Development of Novel Bio-inorganic Hybrid Materials as UV Protection Systems for Potential Cosmetic Applications

2015 ◽  
Vol 16 (12) ◽  
pp. 1070-1077
Author(s):  
Carla Villa ◽  
Chiara Lacapra ◽  
Roberto Rosa ◽  
Paolo Veronesi ◽  
Cristina Leonelli
Keyword(s):  
Hybrid Materials ◽  
Uv Protection ◽  
Inorganic Hybrid ◽  
Protection Systems

Lead-free organic–inorganic hybrid semiconductors and NLO switches tuned by dimensional design

2021 ◽  
Vol 9 (12) ◽  
pp. 4338-4343
Author(s):  
Hong-Yi Shen ◽  
Lei He ◽  
Ping-Ping Shi ◽  
Qiong Ye
Keyword(s):  
Hybrid Materials ◽  
Lead Free ◽  
Inorganic Hybrid ◽  
Hybrid Semiconductors ◽  
Functional Regulation

Two organic–inorganic hybrid materials exhibit functional regulation by introducing homochiral cations and different reagent ratios.

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