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The reactions of gallic acid and quercetin with the excited state Ru(II) complexes proceed through photoinduced electron transfer reaction in sodium dodecyl sulfate (SDS) and aqueous media at pH 11 and has been studied by luminescence quenching technique. The static nature of quenching is confirmed from the ground state absorption studies in both the media. The observed quenching rate constant (k q ) values are sensitive to the nature of the ligand, medium and the structure of the quenchers. The electrostatic interaction of the cationic complexes with the anionic micelle reduces the k q values in SDS compared to that in aqueous medium.

Green chemistry approach is an eco-friendly approach which is used to prevent, or at least reduce pollution and has tremendous application in synthetic organic chemistry. This technique consists of an alternative reaction media to replace hazardous and expensive solvents consistently used in organic synthesis [1]. Green synthesis of organic compounds using solvent-free condition has gained popularity in recent years, since the majority of solvents are either toxic or flammable. Compared with conventional method the solvent free method is more convenient, simple to run, provide higher yield and shows maximum efficiency [2]. Recently fruit juice is known to be the potential organic solvent for the synthesis of pharmaceutically important organic compounds [3]. Fruit juices are used for various organic transformation reactions [4,5] and its widespread applications are due to their inexpensive, non-toxic, safe and environmentally benign nature [6]. Dihydropyrimidinones, the products of Biginelli reaction, are widely used in the pharmaceutical industries. Research has stimulated the invention of a wide range of synthetic methods for their preparation and chemical transformations. Dihydropyrimidinones and their derivatives show wide range of applications in natural, synthetic, pharmacological, therapeutic and

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