Aggregation and metal-complexation behaviour of THPP porphyrin in ethanol/water solutions as function of pH
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897509" target="_blank" >RIV/60076658:12310/18:43897509 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S1386142517309952?token=DE01DF35E52BBB4D07700FD251D922B37E9901336CC3A70DDCEDB45B8D0D6D4C05D33C6D7C488DA51E78D55F247A8587" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S1386142517309952?token=DE01DF35E52BBB4D07700FD251D922B37E9901336CC3A70DDCEDB45B8D0D6D4C05D33C6D7C488DA51E78D55F247A8587</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.saa.2017.12.021" target="_blank" >10.1016/j.saa.2017.12.021</a>
Alternative languages
Result language
angličtina
Original language name
Aggregation and metal-complexation behaviour of THPP porphyrin in ethanol/water solutions as function of pH
Original language description
The effect of pH change on 5,10,15,20-Tetrakis(4-hydroxypheny1)-21H,23H-porphine (THPP) with its aggregation as function of water-ethanol mixture was studied with UV-vis, fluorescence, Raman and computational analysis. In neutral pH, THPP was present as free-base and, increasing the water amount, aggregation occurred with the formation of H- and J-aggregates. The aggregation constant and the concentration of dimers were calculated, other information about the dimer aggregation were evaluated by computational study. In acidic pH, by the insertions of two hydrogens in the porphyrin rings, the porphyrin changed its geometry with a ring deformation confirmed by red-shifted spectrum and quenching in fluorescence; at this low pH, increasing the water amount, the acidic form (THPPH2)(2+) resulted more stable due to a polar environment with stronger interaction by hydrogen bonding. In basic pH, reached by NH4OH, THPP porphyrin was able to react with alkali metals in order to form sitting-atop complex (M2THPP) confirmed by the typical absorption spectrum of metallo-porphyrin, Raman spectroscopy and by computational analysis.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
ISSN
1386-1425
e-ISSN
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Volume of the periodical
193
Issue of the periodical within the volume
MAR 15 2018
Country of publishing house
GB - UNITED KINGDOM
Number of pages
14
Pages from-to
235-248
UT code for WoS article
000424962900031
EID of the result in the Scopus database
2-s2.0-85037990529