微波辐照对铬络合物稳定常数的影响
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摘要
采用等摩尔浓度法和紫外光谱测试法,探讨微波辐照对不同羧酸(甲酸根和草酸根)与铬的配位过程以及对铬络合物稳定常数和络合物稳定性的影响。结果发现,与水浴加热相比,微波辐照下铬络合物的最大吸收波长发生紫移,配位比提高,稳定常数增大,由此说明,微波辐照加速了甲酸根(和草酸根)与铬离子的络合反应速度,增强了甲酸铬络合物(和草酸铬络合物)的水解和配聚,提高了铬络合物的稳定性。
The influence of microwave irradiation on the stability constant of Cr(III) complexes and their coordination process, reacted by Carboxylate complex(formate ion and oxalate ion) and chromic nitrate, were studied with Equimolar concentration and UV-vis spectrophotometry. The results indicate that the stability and rate of complexing reaction of of Cr(III) complexes formed were both accelerated by microwave irradiation compared with water bath heating, because of the violet shift of maximum absorption wavelength, increased complex ratio and stability constant.
The influence of microwave irradiation on the stability constant of Cr(III) complexes and their coordination process, reacted by Carboxylate complex(formate ion and oxalate ion) and chromic nitrate, were studied with Equimolar concentration and UV-vis spectrophotometry. The results indicate that the stability and rate of complexing reaction of of Cr(III) complexes formed were both accelerated by microwave irradiation compared with water bath heating, because of the violet shift of maximum absorption wavelength, increased complex ratio and stability constant.
引文
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[7] Meng T, Wang J, Peng H, et al. Discovery of benzhydrylpiperazine derivatives as CB1 receptor inverse agonists via privileged structure-based approach[J]. European Journal of Medicinal Chemistry, 2010, 45(3):1133? 1139.
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[9] Panagopoulos DJ. Effect of microwave exposure on the ovarian development of drosophila melanogaster[J]. Cell Biochemistry and Biophysics, 2012, 63(2):121-132.
[10] Costa ACS, Assis JCR, Torres ALC, et al. Spectrophotometric determination of chromium with EDTA using microwave oven[J]. Quimica Nova, 1999, 22(2):194-196.
[11]曹念,张金伟,王苏均,等.微波辐照对硝酸铬溶液水解配聚行为的影响[J].皮革科学与工程,2016,26(4):5-9.
[12]陈静,张金伟,周南,等.微波辐照对Cr(Ⅲ)络合物稳定性影响的研究[J].皮革科学与工程,2017,27(4):5-9.
[13]河南大学,南京师范大学,河南师范大学等.配位化学[M].郑州:河南大学出版社,1988.
[14]董芝,秦彦民.关于配合物稳定常数的测定[J].河北工业科技,2005,22(4):198-200.
[15]党静霜,范德勇.配合物组成及稳定常数的测定[J].河北工业科技,2008,25(2):86-89.
[2]牟群英,李贤军.微波加热技术的应用与研究进展[J].物理学和高新技,2004,6(33):438-432.
[3]贾殿赠,杨立新,夏熙,等.微波技术在固相配位化学反应中的应用研究(Ⅰ)-Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)配合物在微波条件下的固相合成[J].高等学校化学学报,1997, 18(9):1432-1435.
[4] Gedye R N. Microwave assisted syntheses in house hold microwave ovens[J].Tetrahedron Letters,1986,27(3):279-283.
[5]黄卡玛,杨晓庆.微波加快化学反应中非热效应研究的新进展[J].自然科学进展,2006,16(3):273-279.
[6]杨晓庆,黄卡玛.微波与化学反应相互作用中的关键问题讨论[J].电波科学学报,2006,21(5):802-809.
[7] Meng T, Wang J, Peng H, et al. Discovery of benzhydrylpiperazine derivatives as CB1 receptor inverse agonists via privileged structure-based approach[J]. European Journal of Medicinal Chemistry, 2010, 45(3):1133? 1139.
[8] Kim TH, Choi JH, Choi YS, et al. Physicochemical properties of thawed chicken breast as affected by microwave power levels[J]. Food Science and Biotechnology, 2011, 20(4):54-64.
[9] Panagopoulos DJ. Effect of microwave exposure on the ovarian development of drosophila melanogaster[J]. Cell Biochemistry and Biophysics, 2012, 63(2):121-132.
[10] Costa ACS, Assis JCR, Torres ALC, et al. Spectrophotometric determination of chromium with EDTA using microwave oven[J]. Quimica Nova, 1999, 22(2):194-196.
[11]曹念,张金伟,王苏均,等.微波辐照对硝酸铬溶液水解配聚行为的影响[J].皮革科学与工程,2016,26(4):5-9.
[12]陈静,张金伟,周南,等.微波辐照对Cr(Ⅲ)络合物稳定性影响的研究[J].皮革科学与工程,2017,27(4):5-9.
[13]河南大学,南京师范大学,河南师范大学等.配位化学[M].郑州:河南大学出版社,1988.
[14]董芝,秦彦民.关于配合物稳定常数的测定[J].河北工业科技,2005,22(4):198-200.
[15]党静霜,范德勇.配合物组成及稳定常数的测定[J].河北工业科技,2008,25(2):86-89.