Com green cobalt orthotitanate pigment was prepared

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Unformatted text preview: imparts on phase purity and morphology of the pigment, whereas the reaction temperature and time affects the growth of particle and therefore particle sizes. The pigment exhibits dark yellow green color in CIE L*a*b* system, high reflectance in the near -IR region, and paramagnetic behavior at room temperature. In addition, Fourier-transform Infrared (FT-IR) and Raman spectroscopy of pigment was studied. 124 3rd ICYC 2010 Universiti Sains Malaysia INO-O5 23rd-25th June 2010 MICROWAVE-ASSISTED AMMONOTHERMAL PREPARATION OF CHROMIUM-DOPED ZIRCON PIGMENTS Sireenart Surinwong and Apinpus Rujiwatra Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand E-mail: [email protected] Green Cr-doped zircon nano-pigments were prepared via the microwave-assisted ammonothermal technique. The influences of various synthetic conditions e.g. type of Si-sources, mineralizers, microwave power and reaction time on the obtained powders were studied and discussed. It has be en revealed that the use of silica as Si-sources and the addition of sodium hydroxide mineralizer play important roles in the formation of zircon framework, and the higher microwave power helps reducing the effective reaction time. Local coordination geometry of the doping Cr were studied using Fouriertransform infrared (FT-IR) and Raman spectroscopy, while the X-ray absorption spectroscopy was used to elucidate the valence state of the doping metal. INO-O6 SYNTHESIS AND CHARACTERIZATION OF FUNCT IONAL IONIC LIQUIDS: [Cu2(RCOO)3(pH3NC6H4COO)](RCOO) Ahmad Nazeer Che Mat and Norbani Abdullah Chemistry Department, Science Faculty, University of Malaya, 50603 Kuala Lumpur, Malaysia E-mail: [email protected] Ionic liquids based on coordination metals are stable functional materials with potential applications in the fields of liquid catalysis, low-temperature spintronics and photonics. This paper reports the synthesis and characterization of [Cu2(RCOO)3(p-H3NC6H4COO)](RCOO) obtained from metathesis reactions of p-H2NC6H4COOH with [Cu2(RCOO)4] where R = CH3(CH2)14COO, CH3(CH2)7CH(C6H13)COO and p-CH3(CH2)6OC6H4COO. The main objec...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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