eprintid: 4497
rev_number: 8
eprint_status: archive
userid: 452
dir: disk0/00/00/44/97
datestamp: 2021-06-21 07:07:39
lastmod: 2021-06-21 07:07:39
status_changed: 2021-06-21 07:07:39
type: conference_item
metadata_visibility: show
creators_name: Vu, Thi Thao
creators_id: vtthao@vnu.edu.vn
corp_creators: L.A. Maiorova
corp_creators: O.I. Koifman
corp_creators: A.V. Lyubimtsev
title: NANOSTRUCTURED LAYERS AND LANGMUIR-SCHAEFER FILMS OF TETRAPHENYLPORPHINE
ispublished: pub
subjects: isi_scopus_conf
divisions: fac_physic
abstract: This work aimed to obtain stable nanostructured floating monolayers and thin films of tetraphenylporphin (H2TPP) by the Langmuir-Schaefer (LS) method. The layer structure was analyzed within the framework of the model of a nanostructured M-monolayer using a quantitative method for analyzing compression isotherms [1-4]. The obtained LS films were examined by electron absorption spectroscopy (Fig. 1a) and electron microscopy (SEM) (Fig. 1b).    
                                        (a)                                                                                (b)
 


Fig. 1. (a) UV-vis spectra of a solution of H2TPP in CH2Cl2 (red) and its LS-films (49 layers, black). On the UV-vis insert, the spectra of films of various thicknesses (2-49 layers); (b) SEM image of LS-film H2TPP.
It was found that H2TPP at the water-air interface at different initial degrees of surface coverage (cface) forms nanostructured edge-on monolayers. The main characteristics of the layers are determined. It was shown that H2TPP forms two-dimensional nanostructures of a very large size - about 60 nm in diameter. In LS-films, these nanostructures are combined into even larger ones - the average diameter is about 250 nm (Fig. 1b). The spectra of Н2ТРР LS films are characterized by a strong bathochromic shift of the Soret band (by 21 nm) and Q-bands (by 4-6 nm) relative to the spectrum of the solution (Fig. 1a), which indicates the formation of J-type nanoaggregates.
date: 2021-06-28
date_type: submitted
official_url: http://www.icpp-spp.org/index.php
full_text_status: public
pres_type: poster
pagerange: 405-405
event_title: Eleventh International Conference on Porphyrins and Phthalocyanines (ICPP-11)
event_dates: 28/06-03/07/2021
event_type: conference
refereed: TRUE
related_url_url: https://cctrixiefiles.s3.amazonaws.com/trixie-configurator-icpp2021/601aa2086cd32b66db71038a/ICPP-11-Book-of-Abstracts.pdf
funders: Russian Ministry of Education and Science
projects: FZZW-2020-0008
citation:   Vu, Thi Thao  (2021) NANOSTRUCTURED LAYERS AND LANGMUIR-SCHAEFER FILMS OF TETRAPHENYLPORPHINE.  In: Eleventh International Conference on Porphyrins and Phthalocyanines (ICPP-11), 28/06-03/07/2021.     
document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4497/1/Vu%20Thi%20Thao_ICCP%2011.jpg