A new mixed-ligand copper pentaborate with square-like, rectangle-like and ellipse-like channels formed via hydrogen bonds
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论文类型：期刊论文
发表时间：2011-10-01
发表刊物：INORGANICA CHIMICA ACTA
收录刊物：Scopus、SCIE
卷号：376
期号：1
页面范围：401-407
ISSN号：0020-1693
关键字：Borate; Solvothermal synthesis; Mixed-ligand; Crystal structure; Hydrogen bonds
摘要：A new mixed-ligand copper pentaborate, [Cu(en)(2)(C5H9NO)][B5O6(OH)(4)](2)center dot C5H9NO (en is ethylenediamine) (1), with novel framework has been synthesized under mild solvothermal condition and characterized by FT-IR, elemental analyses, powder X-ray diffraction and TG-DTA. The structure consists of isolated polyborate anion [B5O6(OH)(4)], copper complex cation [Cu(en)(2)(C5H9NO)](+) and one C5H9NO molecule. The [B5O6(OH)(4)] units are connected to one another through hydrogen bonds to form an interesting three-dimensional (3D) supramolecular framework with alternate square-like channels and rectangle-like channels along the c-axis as well as ellipse-like channels with 16-membered boron rings along the a-axis which are the largest channels in the pentaborate reported so far. The copper complex cation contains two kinds of ligands, en and C5H9NO, forming a square pyramid with an O atom as the vertex. (C) 2011 Elsevier B.V. All rights reserved.