Substituent groups-driven construction of two different Cd(II) coordination polymers from CdSO4, tetrakis(4-pyridyl)cyclobutane and 5-R-1,3-benzenedicarboxylates

• Published in: Inorganic chemistry communications 2013-09, Vol.35, p.302-306
• Main Authors: Li, Duan-Xiu, Chen, Min-Min, Li, Fei-Long, Ren, Zhi-Gang, Wu, Bing, Lang, Jian-Ping
• Format: Article
• Language: English
• Subjects: 1,3-Benzenedicarboxylic acid (1,3-H2BDC); Cadmium(II); Coordination polymer; Crystal structure; Hydrothermal reaction; Tetrakis(4-pyridyl)cyclobutane
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2013.07.014

Hydrothermal reactions of CdSO4 with tetrakis(4-pyridyl)cyclobutane (tpcb) and 1,3-benzenedicarboxylic acid (1,3-H2BDC) or 5-nitro-1,3-benzenedicarboxylic acid (5-NO2-1,3-H2BDC) resulted in the formation of two coordination polymers [Cd(tpcb)0.5(1,3-BDC)]n (1) and {[Cd2(tpcb)(5-NO2-1,3-BDC)2(OH2)2]·4H2O}n (2), respectively. Compounds 1 and 2 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 and 2 exhibit two different types of two-fold interpenetrating 3D architectures with (66)2(64·82) and (52·8)(54·6∙8)(4·53·62·7·82·10) Schläfli symbols, respectively. Their thermal and photoluminescent properties were also investigated. Two Cd(II) 3D coordination polymers [Cd(tpcb)0.5(1,3-BDC)]n and {[Cd2(tpcb)(5-NO2-1,3-BDC)2(OH2)2]·4H2O}n were generated from hydrothermal reactions of CdSO4 with tetrakis(4-pyridyl)cyclobutane (tpcb) and 1,3-benzenedicarboxylic acid (1,3-H2BDC) or 5-nitro-1,3-benzenedicarboxylic acid (5-NO2-1,3-H2BDC). These complexes were structurally characterized by elemental analysis, IR, and X-ray crystallography and their thermal and luminescent properties were studied. [Display omitted] •Reaction of CdSO4 with tpcb and 5-R-1,3-H2BDC (R=H, NO2) gave two complexes.•1 has a 3D (4,4)-connected net with a (66)2(64·82) Schläfli symbol.•2 has a 3D (3,4,5)-connected net with a (52·8)(54·6·8)(4·53·62·7·82·10) topology.•It offers insight into how the MOF arrays are affected by substituent groups.