American Journal of Advanced Drug Delivery Open Access

Anion influence of emission properties and DFT calculations of diprotonated and triprotonated terpyridines

Joint Event on 31^st Nano Congress for Future Advancements & 13^th Edition of International Conference on Nanomedicine and Advanced Drug Delivery

August 29-30, 2019 London, UK

Naokazu Yoshikawa, Shoko Yamazaki, Natsumi Kato, Akari Kubota, Mika Sawai, Kaoru Noda, Nobuko Kanehisa, Tsuyoshi Inoue, Eiji Nakata and Hiroshi Takashima

Nara Women’s University, Japan
Nara University of Education, Japan
Osaka University, Japan
Kyoto University, Japan

Scientific Tracks Abstracts: Am J Drug Deliv

Abstract:

Triprotonated and diprotonated compounds [(L)H3]3+ and [(L)H2]2+ were prepared by the reaction of (L = terpy, tterpy and Clterpy) with a variety of acid (HF, HCl, HBr, H₂SO₄, and H₃PO₄) in water. Protonated pyridine rings are hydrogen bonded intramolecularly to the adjacent anion and intermolecularly to the adjacent PF₆- in compounds. These hydrogen bonds restrain the nonradiative decay to produce intense emission. Density functional theory was applied to interpret the planarity in compounds. The attachment of two protons to the nitrogen in [(terpyH₂)H₂O]²⁺ and[(tterpyH2)H2O]2+ lead to the strong emission in acetonitrile ( 0.29 and 0.30, respectively). The attachment of two protons to the peripheral nitrogens in [(terpyH2)H₂O]²⁺and intermolecularly hydrogen bonded to the two adjacent F atoms in PF₆-, which results in exhibiting a strong emission with a large quantum yield.

Biography :

I am researcher from 2000. I have completed PhD in 2008 from Nara Women’s University and continued postdoctoral studies with Osaka University and Nara educational University. I have published more than 25 papers in reputed journals. I have a interest in iridium complexes and Ruthenium complexes. Recently I am also interested in metal free emission product.