nano-congress-2016_posters-accepted-abstracts

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Volume 7, Issue 4(Suppl) J Nanomed Nanotechnol
ISSN: 2157-7439 JNMNT, an open access journal
Page 73
Nano Congress 2016
August 01-02, 2016
conferenceseries.com
August 01-02, 2016 Manchester, UK
9th Nano Congress for Next Generation
Molecular strategies towards efficient small-molecule photovoltaic materials
Chuanlang Zhan1,2
1Beijing National Laboratory for Molecular Sciences, P R China
2CAS - Institute of Chemistry, P R China
Bulk-heterojunction organic solar cell (BHJ-OSC) utilizes a nanostructured electron donor and electron acceptor blended film to
capture and convert solar photons into electrons. Recently, much attention has been focused on non-fullerene organic acceptors,
which are used as acceptor materials to replace the traditional fullerene acceptor materials. The exciton-type photon-to-electron
conversion efficiencies such as exciton generation and charge separation and transport are largely dependent on the material
absorption, frontier molecular orbitals and film-morphology. In this report, I will show our results on the molecular strategies towards
efficient small-molecule photovoltaic materials. The results include: (1) The photovoltaic properties from the twisted perylene-dimide
dimer acceptors, (2) the photovotaic properties from BODIPy based small molecule donor and acceptor, and (3) the photovoltaic
properties from Diketopyrrolopyrrole (DPP) and quinoidal methyl-dioxocyano-pyridine based small molecule donors, in particular,
the effects of the end units capping on the DPP main chain and the influence from the anchoring groups terminated on the flexible
alkyl chains.
Nanocrystalline hydroxyapatite-phosphonate composites
Debbabi Mongi
University of Monastir, Tunisia
Two new hybrid compounds apatite-phosphonate are prepared by hydrothermal method. For that, vinyl or methyl phosphonic
acid variable quantity is added during apatite synthesis. X-ray diagrams confirmed the apatite structure conservation and
permitted to evaluate crystallite sizes. The values are in nanometric range (25 - 2.5 nm). IR and Raman spectroscopy showed apatite
characteristic bands and also phosphonate bands.31PMAS-NMR spectra present the apatite isotropic signal and new signals attributed
to phosphonate organic phosphor. 13 C MAS-NMR reveals vinyl or methyl characteristic signals. Thermo gravimetric analysis shows a
weight loss between 200 and 600°C attributed to the organic moiety decomposition. Differential thermal analysis (DTA) confirms the
exothermic effect. The value of this loss increases with the increase of grafting, in good agreement with the results of the 13C chemical
analysis. Specific area measurements show obtaining porous hybrid apatite-phosphonate compounds whose porosity is controlled
by the rate and the nature of the graft. The observation by Transmission Electron Microscopy (TEM) and Atomic-force microscopy
(AFM) powders of these new materials shows that the crystallite size is in the nanometer scale and decreases with the amount of graft
added during synthesis.
J Nanomed Nanotechnol 2016, 7:4 (Suppl)