najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2016-7-1-125-132najo-813Research ArticlePAPERS, PRESENTED AT THE CONFERENCEPAPERS, PRESENTED AT THE CONFERENCEComparative Raman study of photo-oligomer stability in the donor-acceptor fullerene complex {Pt(dbdtc)2}·C60 and pristine C60Comparative Raman study of photo-oligomer stability in the donor-acceptor fullerene complex {Pt(dbdtc)2}·C60 and pristine C60MeletovK. P.MeletovK. P.

Chernogolovka, Moscow region

Chernogolovka, Moscow region

mele@issp.ac.ruArvanitidisJ.ArvanitidisJ.

GR-54 124 Thessaloniki

GR-54 124 Thessaloniki

ChristofilosD.ChristofilosD.

GR-54 124 Thessaloniki

GR-54 124 Thessaloniki

KourouklisG.KourouklisG.

GR-54 124 Thessaloniki

GR-54 124 Thessaloniki

Institute of Solid State Physics, Russian Academy of SciencesInstitute of Solid State Physics, Russian Academy of SciencesAristotle University of ThessalonikiAristotle University of Thessaloniki20161408202571Special Issue: Proceedings of the 12th Biennial International Conference “Advanced Carbon Nanostructures” (ACNS’2015)125132Copyright © Meletov K.P., Arvanitidis J., Christofilos D., Kourouklis G., 20252025Meletov K.P., Arvanitidis J., Christofilos D., Kourouklis G.Meletov K.P., Arvanitidis J., Christofilos D., Kourouklis G.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/813

The photopolymerization process and the stability of the C60 photo-oligomers at elevated temperature in the molecular donor-acceptor fullerene complex {Pt(dbdtc)2}·C60 (C60 complex with platinum dibenzyldithiocarbamate) and pristine fullerite C60 are studied by Raman spectroscopy. Fast polymerization, manifested by the appearance of additional peaks in the frequency region of the Ag(2) pentagon-pinch (PP) mode of the C60 molecule, was observed upon sample illumination at 514.5 and 532 nm, even at low laser power density as well as at 785 nm at higher power density. The frequencies of the new peaks are in accordance with the empirical dependence of the PP-mode frequency on the number of the sp3-like coordinated carbon atoms per molecular cage. The temperature dependence of the polymer content under constant laser power density reveals the decomposition of the photo-oligomers to monomers at ∼ 350 K in the fullerene complex {Pt(dbdtc)2}·C60 and at ∼ 410 K in the case of the pristine C60. These values are considerably smaller than the decomposition temperature of 525 – 565 K for the crystalline polymers of C60.

The photopolymerization process and the stability of the C60 photo-oligomers at elevated temperature in the molecular donor-acceptor fullerene complex {Pt(dbdtc)2}·C60 (C60 complex with platinum dibenzyldithiocarbamate) and pristine fullerite C60 are studied by Raman spectroscopy. Fast polymerization, manifested by the appearance of additional peaks in the frequency region of the Ag(2) pentagon-pinch (PP) mode of the C60 molecule, was observed upon sample illumination at 514.5 and 532 nm, even at low laser power density as well as at 785 nm at higher power density. The frequencies of the new peaks are in accordance with the empirical dependence of the PP-mode frequency on the number of the sp3-like coordinated carbon atoms per molecular cage. The temperature dependence of the polymer content under constant laser power density reveals the decomposition of the photo-oligomers to monomers at ∼ 350 K in the fullerene complex {Pt(dbdtc)2}·C60 and at ∼ 410 K in the case of the pristine C60. These values are considerably smaller than the decomposition temperature of 525 – 565 K for the crystalline polymers of C60.

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The authors declare that there are no conflicts of interest present.