Experimental and Theoretical (ab initio and DFT) Analysis of UV-Vis Spectra, Thermodynamic Functions and Non-linear Optical Properties of 2-Chloro-3,4-Dimethoxybenzaldehyde Journal title: JOURNAL OF ADVANCES IN PHYSICS Authors: sarvendra kumar, Rajesh Kumar, Jayant Teotia, M. K. Yadav Subject(s):