1. Department of Chemistry, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand
2. Faculty of Science and Technology, Thammasat University, 2 Prachan Road,
Phra Nakhon District, Bangkok 10200, Thailand
3. Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States