Cu(II)-based coordination polymer encapsulated formate: Unveiling efficient photocatalytic degradation of Rose Bengal dye and remarkable sensing of DMF, acetone and acetonitrile

Abstract

In this work, we have designed a new copper based coordination polymer (CP), {[Cu5(Bimb)10(H2O)2(HCOO)2]·(H2O)16(HCOO)8}n (KA@CP-S2) (Bimb = 1,4-bis[(1H-imidazol-1-yl)methyl]benzene) for the degradation of organic dyes and detection of small organic solvents. KA@CP-S2 has a two-dimensional (2D)network structure.4-connected uninodal 2D sqltopologyis depicted by KA@CP-S2with the point symbol of (44.62).KS@CP-S2exhibits effectivephoto-catalyst for the degradation of harmful dyes with degradation efficiencies of 97.7% (Rose Bengal), 95.8% (Bromophenol Blue) and 94.8%(Congo Red)from aqueous solutions under exposure of visible sun light.Importantly, sensing measurements shows that KS@CP-S2 can be employed as a luminescent sensor for accurately and consistently detectingof DMF, Acetone and CH3CNamong various solvents. The fluorescence quenching pathway for the solvent was established by the spectral overlap and nature of Stern-Volmer plots. Their stability and recyclability after sensing measurements are found to be excellent. The potentialdetection limits for DMF, Acetone and CH3CN was determined to be as low as 0.037, 0.027, 0.014 vol%, respectively.