Multiporphyrin Self‐Assembled Arrays in Solutions and Films: Thermodynamics, Spectroscopy, and Photochemistry

Abstract

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Ligand Exchange Dynamics and Temperature Effects upon Formation of Nanocomposites Based on Semiconductor CdSе/ZnS Quantum Dots and Porphyrins: Ensemble and Single Object Measurements

“…[91,92] Thus, CuP(m-Pyr) 4 molecules may be considered as an inner standard showing that the surrounding solvent matrix does not change upon temperature lowering At the same conditions, PL intensity for QD in "QD-CuP" nanocomposites shows again a "kink" ( Figure 6A, inset), which, however, is now much more pronounced (-23%) than in the absence of CuP (compare curves 1 and 3, Figure 9B). A comparison of temperature dependent QD PL intensities obtained for various porphyrins is shown in Figure 9B.…”

Deactivation of Excited States in Nanostructures Containing Cu-Porphyrin Subunit

“…In this paper, the subject of the discussion will be the dimers in which tetrapyrrolic subunits are covalently linked via spacers of various nature: i) ethane-bisporphyrins with a single -CH 2 -CH 2 -via meso-positions, [34,[61][62][63][64][65][66][67] ii) cyclodimers where cyclopentaneporphyrin molecules are coupled via isocycles, [68][69][70][71][72][73] and iii) chemical dimers of octaethylporphyrins with the phenyl bridge via meso-positions. [17,18,27,[74][75][76] It should be noted that in order to clarify spectral-kinetic properties that are characteristic for the dimers namely, we have especially prepared and characterized the precursor monomeric species with side substituents of the same nature and in the same positions like the corresponding spacers.…”

“…[21,27,38,74,[77][78][79][80] The covalent stage includes the synthesis of Zn-porphyrin chemical dimers or trimers with a phenyl spacer in meso-position. The second stage presents itself the self-assembly of these dimers or trimers with meso-pyridyl substituted porphyrins (free bases or Cu-complexes) via non-covalent binding interactions (two-fold extra-ligation effect following the "key-lock" principle).…”

“…[54] First results of our group in this field have been obtained for mixed ethanebisporphyrins in [1983][1984]. [62,63,105] In the [17,18,27,[74][75][76] Me: H 2 , Zn and/or Cu.…”

“…and nanobiophotonics (nanoprobes for biomedical imaging, biosensing and photodynamic therapy of cancer, etc). [23][24][25][26][27][28][29][30][31][32] In this respect, the 2014 Nobel Prize in chemistry (E. Betzig, S.W. Hell and W.E.…”