期刊
ULTRASONICS SONOCHEMISTRY
卷 37, 期 -, 页码 382-393出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2017.01.021
关键词
Coordination supramolecular; Sonochemical process; Ultrasound irradiation; Morphology
资金
- University of Sistan and Baluchestan (USB)
- Tarbiat Modares University
- Institut Catala de Nanociencia i Nanotecnologia (ICN2)
Two new mercury(II) coordination supramolecular compounds (CSCs) (1D and 0D), [Hg(L)(I)(2)](n) (1) and [Hg-2(L')(2)(SCN)2]center dot 2H(2)O (2) (L = 2-amino-4-methylpyridine and L' = 2,6-pyridinedicarboxlic acid), have been synthesized under different experimental conditions. Micrometric crystals (bulk) or nano-sized materials have been obtained depending on using the branch tube method or sonochemical irradiation. All materials have been characterized by field emission scanning electron microscope (FESEM), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD) and FT-IR spectroscopy. Single crystal X-ray analyses on compounds 1 and 2 show that Hg2+ ions are 4-coordinated and 5-coordinated, respectively. Topological analysis shows that the compound 1 and 2 have 2C1, sql net. The thermal stability of compounds 1 and 2 in bulk and nano-size has been studied by thermal gravimetric (TG), differential thermal analyses (DTA) for 1 and differential scanning calorimetry (DSC) for 2, respectively. Also, by changing counter ions were obtained various structures 1 and 2 (1D and 0D, respectively). The role of different parameters like power of ultrasound irradiation, reaction time and temperature on the growth and morphology of the nano-structures are studied. Results suggest that increasing power ultrasound irradiation and temperature together with reducing reaction time and concentration of initial reagents leads to a decrease in particle size. (C) 2017 Elsevier B.V. All rights reserved.
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