Femtosecond Time-resolved Mass Spectrometry For The Desorption Process Of Tetracene Ions From Tetracene-doped Anthracene Crystals | 10209
ISSN: 2155-9872

Journal of Analytical & Bioanalytical Techniques
Open Access

Like us on:

Our Group organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)
Google scholar citation report
Citations : 3463

Journal of Analytical & Bioanalytical Techniques received 3463 citations as per google scholar report

Journal of Analytical & Bioanalytical Techniques peer review process verified at publons
Indexed In
  • CAS Source Index (CASSI)
  • Index Copernicus
  • Google Scholar
  • Sherpa Romeo
  • Academic Journals Database
  • Open J Gate
  • Genamics JournalSeek
  • JournalTOCs
  • ResearchBible
  • China National Knowledge Infrastructure (CNKI)
  • Ulrich's Periodicals Directory
  • Electronic Journals Library
  • RefSeek
  • Directory of Research Journal Indexing (DRJI)
  • Hamdard University
  • OCLC- WorldCat
  • Scholarsteer
  • SWB online catalog
  • Virtual Library of Biology (vifabio)
  • Publons
  • Euro Pub
Share This Page

Femtosecond time-resolved mass spectrometry for the desorption process of tetracene ions from tetracene-doped anthracene crystals

4th International Conference and Exhibition on Analytical & Bioanalytical Techniques

Tatsuya Fujino

ScientificTracks Abstracts: J Anal Bioanal Tech

DOI: 10.4172/2155-9872.S1.013

Matrix-assisted laser desorption/ionization (MALDI) is one of the ?soft ionization? methods which do not decompose analyte during ionization process. MALDI combined with time-of-flight mass spectrometry (MALDI-MS) has been widely used in many research fields since it enables observation of analyte ions in terms of their molecular weights. Regardless of voluminous applications in MALDI-MS, the mechanism of MALDI is not fully understood. MALDI includes two important processes; ionization and desorption. Although knowledge of the ionization process in MALDI has accumulated by several efforts, the mechanism of desorption process remains unclear. This hinders the detection of many kinds of molecules by this method. In this study, we have investigated desorption dynamics by using newly developed femtosecond time-resolved mass spectrometry. To simplify the roles of matrix and analyte, tetracene-doped anthracene crystals (TDA), in which efficient energy transfer from anthracene to tetracene occurs, were used as a model system and the desorption dynamics of tetracene ions ([tetracene] + ) from the anthracene crystals was observed. The rise time of the peak intensity of tetracene ions is determined 94.7 ps. According to the time-resolved fluorescence study, it was observed that the tetracene molecules are excited to the S 1 state after the 9.4 ps delay of pumping, and the S 1 tetracene can be ionized immediately by the irradiation of time-delayed probe pulses. However, the mass intensity of the tetracene ions grows at 94.7 ps after the pumping, suggesting the observation of the slow desorption of the tetracene ions in the mass spectrum. Our results reveal that desorption of tetracene ions is triggered by the electronic relaxation of anthracene leading to the vibrational excitation of lattice phonon modes in the crystals. The delayed growth of the mass signal implies that the time required for the intermolecular dissociative modes to be excited by the relaxation.
Tatsuya Fujino, attained his Doctor of science from Tokyo Institute of Technology in 1998. He worked as a postdoctoral researcher of Japan Society for the Promotion of Science (JSPS) at Institute of Molecular Science (IMS) 1998-2002 and as a special postdoctoral researcher at RIKEN, 2002- 2005. Since 2005-till date, he is an Associate Professor at Tokyo Metropolitan University. He got New Century Award from the Japan Society for Analytical Chemistry (JSAC) in 2006. Best presentation awards from the Spectroscopical Society of Japan (SPSJ) in 2004 and from the Kanto branch of Chemical Society of Japan (CSJ) in 2007.