1. Central Department of Chemistry, Tribhuvan University, Kathmandu 44613, Nepal
2. Research Centre for Applied Science and Technology, Tribhuvan University, Kathmandu 44613, Nepal
3. Center for Analytical Sciences, Kathmandu Institute of Applied Sciences, Kathmandu 44600, Nepal
4. Department of Chemistry, Physics and Materials Science, Fayetteville State University, Fayetteville, North Carolina 28301, United States