Photocatalytic properties and luminescent sensing of a new 2D layer coordination polymer

ABSTRACT

A 2D coordination polymer [Zn2(betc)(bip)2]·3H2O (1) has been synthesised by deploying mixed ligand strategy . The photoluminescence properties of 1 in different solvents have been investigated and its sensing properties to detect nitroaromatic compounds (NACs) have been explored. 1 displayed selective sensing for 4- nitrotoluene (4-NT) with lower limit of detection (LOD) 0.62 ppm. The probable mechanism for sensing of NACs by 1 ha s been addressed using quantum chemical calculations. Also photocatalytic properties of 1 to photo-decompose model aromatic dyes viz. methyl violet (MV) and 20 rhodamine B (Rh B) have been evaluated. The experiments indicated that 1 displayed better photocatalytic performance in photo-degrading MV than Rh B. The plausible mechanism through which 1 displayed photocatalytic degradation of aromatic dyes had been revealed using density of states (DOS) and partial DOS calculations.

The probable mechanism for the photocatalytic property and emission quenching of 1 has been proposed with the aid of density of states and partial density of states calculations.

Graphical Abstract

KEYWORDS:

• Photocatalysis
• sensing
• layer
• Density of states (DOS)

Disclosure statement

No potential conflict of interest was reported by the authors.

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Funding

The authors acknowledge financial assistance from Sichuan University of Science and Engineering [grant number 2015RC23, 2017RCL02], the Education Committee of Sichuan Province [grant number 17ZA0265, 18ZB0422 and 18ZB0425], the Department of Science and Technology of Sichuan Province [grant number 2017JY0129], the Project of Zigong Science & Technology [grant number 2016HG04, 2018YYJC01], the Opening Project of Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education [grant number LZJ1705] and the Student's Platform for Innovation and Entrepreneurship Training Program [grant number 201810622053], “Student’s Platform for Innovation and Entrepreneurship Training Program”, “Council of Scientific and Industrial Research New Delhi”, “Guangdong Medical university Research [grant number M2015031]” and “Shenzhen Peacock Plan (Research and Development and Industrialization of in vitro Diagnostic Nanomaterials for Tumors)”.