Water–porphyrin interactions and their influence on self assembly of large scale porphyrin aggregates

Udal’tsov, Alexander V.; Kazarin, L. A.; Sinani, Vladimir A.; Sweshnikov, A.A.

doi:10.1016/s1010-6030(02)00145-4

Cited by 22 publications

(18 citation statements)

References 14 publications

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“…to "NÁ Á ÁHAOH and NAHÁ Á ÁOH 2 bonds vibrations [28]. Importantly that the band at 3216-3220 cm À1 of the stretching vibrations of NAH groups observed for hydrated mono-protonated TPP dimers [18,31] is absent in curve 2 ( Fig. 5) but the 2766 cm À1 band is observed instead.…”

Section: Infrared Spectroscopy Of Protonated Tpp Assemblies In Thin Fmentioning

confidence: 88%

“…5) but the 2766 cm À1 band is observed instead. The observed red shift by 450 cm À1 is due to the second Zundel cation embedded between TPP units, so that the NAH groups are involved in the stronger interactions relative to those in the mono-protonated dimer [18,31] and also bound in the complex. The positive charges on the protonated TPP dimers in a solution are delocalized over the conjugated 18-electron p-system of the macrocycle that can be depicted as follows, see Scheme 1.…”

Section: Infrared Spectroscopy Of Protonated Tpp Assemblies In Thin Fmentioning

confidence: 98%

“…A band at 1486 cm À1 increased in the magnitude under protonation, which arises from the protonated C@N bond vibrations in pyrrole moieties of the TPP dimers [31], is found in curve 1 (Fig. 5).…”

Section: Infrared Spectroscopy Of Protonated Tpp Assemblies In Thin Fmentioning

confidence: 98%

See 2 more Smart Citations

Microcrystals engineering using assemblies of di-protonated meso-tetraphenylporphine dimers under Zundel cations operation

Udal’tsov

2015

Journal of Molecular Structure

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Section: Infrared Spectroscopy Of Protonated Tpp Assemblies In Thin Fmentioning

confidence: 88%

Section: Infrared Spectroscopy Of Protonated Tpp Assemblies In Thin Fmentioning

confidence: 98%

See 1 more Smart Citation

Microcrystals engineering using assemblies of di-protonated meso-tetraphenylporphine dimers under Zundel cations operation

Udal’tsov

2015

Journal of Molecular Structure

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“…Взаимодействие молекул воды с протонами внутрициклических групп NH порфиринов, в том числе обменные процессы, играет значительную роль в образовании супрамолекулярных систем (ассоциатов, различных агрегатов, молекулярных кристаллов, органо-неорганических систем и др. ), [1][2][3] а так же при реализации рецепторной [4,5] и органокаталитической [5,6] функций порфиринов и их аналогов. Метод DOSY интенсивно используется для изучения химических свойств порфиринов и их аналогов, [7][8][9][10][11][12][13][14][15] в том числе процессов протонного обмена с участием внутрициклических протонов NH.…”

Section: Introductionunclassified

Activation Energy of Proton Exchange Processes of Deuteroporphyrin IX Dimethyl Ester with Water in C6D6 Medium Based on DOSY Data

Stolypko¹,

Белых²

2019

MHC

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Методом DOSY определены энергии активации процессов, обуславливающих изменение коэффициента самодиффузии D протонов воды и внутрициклических протонов NH диметилового эфира дейтеропорфирина IX (D W и D NH ), связанных с протонным обменом между молекулами этих соединений в среде C 6 D 6 . Энергия активации процессов, обуславливающих изменение D W и D NH , составила соответственно Е а (W) = 27.3 ± 1.3 кДж/моль и Е а (NH) = 15.8 ± 0.7 кДж/моль. Судя по полученным данным, активационные барьеры во всех случаях связаны с разрывом водородных связей при образовании и разрушении ассоциатов порфирин-вода, формирование которых является необходимым условием протекания обмена.Ключевые слова: Порфирины, спектроскопия DOSY, протонный обмен, энергия активации, дейтеропорфирин IX. The activation energies of the processes which determine the change in the self-diffusion coefficient D of water protons and the internal NH protons of deuteroporphyrin IX dimethyl ester (D W and D NH ) associated with the proton exchangebetween the molecules of these compounds in C 6 D 6 medium are determined by the DOSY method. The activation energies of the processes that cause the change in D W and D NH were estimated to be E a (W) = 27.3 ± 1.3 kJ/mol and E a (NH) = 15.8 ± 0.7 kJ/mol, respectively. The data obtained show, that activation barriers in all cases are associated with the breaking of hydrogen bonds during the formation and destruction of porphyrin-water associates, the formation of which is a necessary condition for the exchange.

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“…A range of porphyrins have been found to form nanorod like structures for example Reddy et al [27] demonstrated that H 2 TPP in acidic environments forms well defined nanorods assigned to occur due to J-aggregation. In porphyrins the formation of J aggregates are reported to result in a red-shift in absorption bands [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Optical properties of porphyrin: graphene oxide composites

Reddy

Al-Shammari

Al-Attar

et al. 2014

Nanostructured Thin Films VII

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In this work we aim to (via a non-invasive functionalization approach) tune and alter the intrinsic features of optically "transparent" graphene, by integrating water-soluble porphyrin aggregates. We explore the potential to combine porphyrin aggregates and graphene oxide to assess the advantages of such as a composite compared to the individual systems. We apply a range of optical spectroscopy methods including photo-absorption, fluorescence assess ground-state and excited state interactions. Our studies show that comparing resonant Raman scattering with optical transmission and fluorescence microscopy that the presence of influences the microscopic structures of the resulting composites.

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Water–porphyrin interactions and their influence on self assembly of large scale porphyrin aggregates

Cited by 22 publications

References 14 publications

Microcrystals engineering using assemblies of di-protonated meso-tetraphenylporphine dimers under Zundel cations operation

Microcrystals engineering using assemblies of di-protonated meso-tetraphenylporphine dimers under Zundel cations operation

Activation Energy of Proton Exchange Processes of Deuteroporphyrin IX Dimethyl Ester with Water in C6D6 Medium Based on DOSY Data

Optical properties of porphyrin: graphene oxide composites

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