All that glitters is not gold: A non-destructive probing of Thanjavur painting by Raman spectroscopy.

In this work, we demonstrate the use of Raman spectroscopy in detecting the presence of gold and semi-precious/precious gemstones in one of the classical paintings of India namely the Thanjavur paintings which have been awarded the Geographical Indication. We find through Raman spectroscopy that there are paintings where fake gold is used in the place of original gold foils. This result has been validated by carrying out the energy dispersive X-ray analysis (EDX) which confirms the Raman spectroscopy findings.

Disulphide linkage: To get cleaved or not? Bulk and nano copper based SERS of cystine.

Different nano-structures of noble metals have been the conventional substrates for carrying out Surface Enhanced Raman Spectroscopy (SERS). In this paper we examine electrodeposited copper (Cu) nano-structures on pencil graphite as novel substrate to carry out SERS measurements by considering l-cystine (Cys-Cys) (dimer of the amino acid cysteine) as the probe. The formation of monolayer of the probe molecule on the substrates was confirmed using cyclic voltammetric measurements.

Correction: The photocatalytic role of electrodeposited copper on pencil graphite.

Correction for 'The photocatalytic role of electrodeposited copper on pencil graphite' by Arathi P. J. et al.

The photocatalytic role of electrodeposited copper on pencil graphite.

We report on the ability of template-electrodeposited copper on pencil graphite as a novel and cost effective photocatalyst by considering the photodimerization of p-aminothiophenol (p-ATP) to 4,4'-dimercaptoazobenzene.

Conformation analysis of 1″,4″-Dispirocyclohexane-6,6'-bis(benzothiazoline): Combined IR, Raman, XRD and DFT approach.

The subject of the study is the structure and conformation of 1″,4″-Dispiro-cyclohexane-6,6'-bis(benzothiazoline), a dispiro compound that has a cyclohexyl ring flanked by two benzothiazoline rings on either side. Using single crystal X-ray diffraction measurements, Infra-red absorption, and Raman spectroscopy techniques, it is found that the central cyclohexyl ring assumes the chair conformation and the sulfur, nitrogen atoms in both the benzothiazole rings are in the trans configurations. The experimental findings are further corroborated by geometry optimization and frequency calculations at B3LYP/6-311++G** level of theory using Gaussian 09 suite of program.