Spectroscopic insights on selfassembly and excited state interactions between rhodamine and phthalocyanine molecules

Geng, Hao; Zhang, Xianfu

doi:10.1016/j.saa.2014.12.010

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…MPcs including iron derivatives has been known to bind non-covalently the axial ligands such as N-bases [26][27][28][29][30][31]. We assumed that in the case of diiron dimeric species Cl(FePc) 2 N the axial binding of substrates involved also takes place.…”

Section: Resultsmentioning

confidence: 99%

Reduction of (chloro)-μ-nitrido-bis[(tetra-tert-butyl-phthalocyaninato)iron(IV)] with organic N-bases

Зайцева

Зданович

Tyulyaeva

et al. 2016

J. Porphyrins Phthalocyanines

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ABSTRACT:The interaction of (chloro)-m-nitrido-bis[(tetra-tert-butyl-phthalocyaninato)iron(IV)] Cl(FePc) 2 N with organic N-bases L as electron-donors (L = diethylamine, imidazole, 1-methylimidazole, 2-methylimidazole) with the formation of one-electron reduced species (L)PcFe III -N=Fe IV Pc(L) was investigated in benzene at 298 K by UV-visible spectroscopy. The reaction was established to be stepwise process including fast reversible axial binding of two substrate molecules onto iron cations followed by slow one-electron metal-centered reduction. The results of IR, ESI-MS and EPR study support the formation of final product with Fe +3 -N=Fe +4 unit and two substrate molecules in the first coordination sphere. The reaction kinetics was studied, the pre-equilibrium constants K eq and rate constants k were obtained. The K eq and k values were found to be linearly correlated with basicity of substrates pК a . The possibility of the transition Fe 4+ → Fe 3+ is promoted by electron-donor properties of substrate combined with the presence of both electron-rich macrocycle and p-backdonation Fe ← N Pc .

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Section: Resultsmentioning

confidence: 99%

Reduction of (chloro)-μ-nitrido-bis[(tetra-tert-butyl-phthalocyaninato)iron(IV)] with organic N-bases

Зайцева

Зданович

Tyulyaeva

et al. 2016

J. Porphyrins Phthalocyanines

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“…In order to identify and study on the charge transfer phenomenon of [60]Fullerene derivatives as the acceptor in donor-acceptor hybrids, spectroscopic techniques have been extensively used [16][17][18][19] . As a well-known donor-acceptor hybrid, [60]Fullerene-Pcs have been studied as charge transfer assemblies employing spectroscopic techniques [20][21][22][23]. Furthermore, photoactive supramolecular assemblies, in which both donor and acceptor moieties are non-covalently linked together, are principally attractive either as prototypes of the conversion of light into electric current or natural photosynthesis [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Through-space electronic communication of zinc phthalocyanine with substituted [60]Fullerene bearing O2Nxaza-crown macrocyclic ligands

Ghanbari

Shahhoseini

Mahlooji

et al. 2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Two new macrocyclic ligands containing 17- and 19-membered ON-donor aza-crowns anchored to [60]Fullerene were synthesized and characterized by employing HPLC, electrospray ionization mass (ESI-MS), H andC NMR, UV-vis, IR spectroscopies, as well as powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA) in solid state. TGA measurements revealed that upon linking each of these macrocycle rings to [60]Fullerene, the decomposition point measured for [60]Fullerene moiety was increased, indicating on the promoted stability of [60]Fullerene backbone during binding to these macrocyclic ligands. Moreover, the ground state non-covalent interactions of [60]Fullerene derivatives of ON (x=2, and 3) aza-crown macrocyclic ligands namely, L-L with zinc phthalocyanine (ZnPc) were also investigated by UV-vis absorption, steady state and time resolved fluorescence spectrophotometry in N-methyl-2-pyrrolidone (NMP). The calculation of Stern-Volmer constants (K) indicated on existence of an efficient quenching mechanism comprising of the excited singlet state of ZnPc in the presence of L-L. The observation of an appropriate correlation between decrease in fluorescence intensity and lifetime parameters led us to propose the occurrence of a static mechanism for the fluorescence quenching of ZnPc in the presence of L-L. The binding constants (K) of L-L/ZnPc were also determined applying the fluorescence quenching experiments. Meanwhile, the incompatibility of both K and K values found for L was also described in terms of structural features using DFT calculations using the B3LYP functional and 6-31G* basis set.

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Spectroscopic study of the interaction between rhodamine B and graphene

Raza

Naqvi

Usman

et al. 2021

Journal of Photochemistry and Photobiology A: Chemistry

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Spectroscopic insights on selfassembly and excited state interactions between rhodamine and phthalocyanine molecules

Cited by 3 publications

References 42 publications

Reduction of (chloro)-μ-nitrido-bis[(tetra-tert-butyl-phthalocyaninato)iron(IV)] with organic N-bases

Reduction of (chloro)-μ-nitrido-bis[(tetra-tert-butyl-phthalocyaninato)iron(IV)] with organic N-bases

Through-space electronic communication of zinc phthalocyanine with substituted [60]Fullerene bearing O2Nxaza-crown macrocyclic ligands

Spectroscopic study of the interaction between rhodamine B and graphene

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