a
Photosciences and Photonics Group, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum 695 019, India
b
Inorganic Chemistry Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum 695 019, India
c
School of Chemical Sciences, National Institute of Science Education and Research, IOP Campus, Sainik School – P. O., Bhubaneswar – 751 005, India
E-mail: srini@niser.ac.in
;
Fax: +91 674-2302436