Acknowledgment
I express my deep sense of gratitude, respect and admiration to my guide Prof. S. N. Datta for his constant support and guidance. I am greatly indebted to him for his priceless help, genial behavior, moral boost, good wishes, ebullience, criticism, enormous patience, useful suggestions and keen interest throughout the continuation of my work. His thorough approach to scientific problems and affirmative outlook has always enlivened me. I am grateful to Council of Scientific and Industrial Research for fellowship. I also acknowledge Department of Science and Technology (DST) grants “Theoretical investigation of magnetism in molecules, molecular magnets and magnetic materials (SR/S1/PC-19/2010)” and “Theoretical and computational investigation of molecular magnets and extended systems as candidates of exotic nanomaterials with usefull properties (DST/INT/Spain/P42/2012)” for computing facilities. I convey my deepest gratitude and respect to Prof. R. B. Sunoj and Prof. Arindam Chowdhury for painstakingly evaluating my annual progress reports and bestowing their valuable suggestions and comments throughout the PhD program. I would also like to thank my co-workers and friends Saumik Sen, Dr Soumendra Roy, Shekhar Hansda, Arun Pal, Tumpa Sadhukhan, Dr. Nital Mehta, Dr. Anirban Panda, Pritam Jana, Suranjan Shil, Ved Prakash Singh, Ujjal Bhattechjee, and Srikant V. Raghavan.
Iqbal Abdul Latif