Facile synthesis and characterizations of copper–zinc-10,15,20-tetra(4-pyridyl) porphyrin (Cu–ZnTPyP) coordination polymer with hexagonal micro-lump and micro-prism morphologies

• Published in: Journal of colloid and interface science Vol. 432; no. 432; pp. 229 - 235
• Main Authors: Zhang, Zhiguang, Li, Xinyong, Zhao, Qidong, Ke, Jun, Shi, Yong, Ndokoye, Pancras, Wang, Lianzhou
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15.10.2014; Elsevier
• Subjects: Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Growth mechanism; Infinite coordination polymer; Light absorption property; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Porphyrin; Surfactant; Light absorption property; Surfactant; Porphyrin; Infinite coordination polymer; Growth mechanism; Metal organic framework; Nitrogen heterocycle; Transition metal; Non spherical particle; Zinc; Characterization; Synthesis; Morphology; Light absorption; Copper
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2014.07.005

[Display omitted] •Hexagonal microprisms of Cu–ZnTPyP coordination polymer were synthesized.•The effect of CTAB concentration on the microstructure of Cu–ZnTPyP was investigated.•The growth mechanism of the Cu–ZnTPyP coordination polymers was proposed.•The hexagonal micro-prisms of Cu–ZnTPyP coordination polymer displayed enhanced photo response. Cu–ZnTPyP coordination polymer with hexagonal micro-lump and micro-prism morphologies has been successfully synthesized through a facile surfactant assisted self-assembly method based on Cu(OAc)2⋅2H2O and Zinc-5,10,15,20-tetra(4-pyridyl) porphyrin (ZnTPyP) in DMF/H2O solvent. The morphologies of three-dimensional micro-prisms and micro-lumps obtained at different concentrations of cetyltrimethylammonium bromide (CTAB) were investigated by scanning electronic microscopy. The compositions of the micro-prisms were studied by energy-dispersive spectra and inductively coupled plasma-atomic emission. X-ray diffraction analysis revealed a circular hexametric cage structure cross-linked by the main Zn–N axial coordination of the pyridyl ligands inside the micro-scale coordination polymers. The UV–Vis diffuse reflection spectroscopy revealed the formation of J-type aggregates in the both microstructures. The formation mechanism of Cu–ZnTPyP coordination polymer structure was investigated by varying CTAB concentration. Their surface photovoltage spectra indicated that the novel hexagonal micro-prism morphology of the coordination polymer displayed enhanced photo response under visible light, which is beneficial for exploiting the practical application of Cu–ZnTPyP compound.