Ultrafast excitation relaxation in titanylphthalocyanine thin film

Zhou, Jiong; Mi, Jun; Zhu, Rongshu; Li, Bo; Qian, Shixiong

doi:10.1016/j.optmat.2004.09.003

Cited by 18 publications

(16 citation statements)

References 25 publications

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“…The positive rise of DT flips its sign to negative at ~720 nm. The positive step-like rise of DT is due to the instantaneous photobleaching and the flip of sign indicates the increased contribution of excited state absorption that is dominant at the central region of Q-band absorption spectrum [1][2][3][4][5][6]. Similar temperature and wavelength dependences of carrier dynamics were observed for 50 nm-thick film.…”

Section: Resultssupporting

confidence: 55%

“…Metallophthalocyanine (MPc) has a central metal atom and its optical and chemical properties depend on the variation of the metal atom and the position and nature of substitute atoms. Therefore, the knowledge of the precise morphology, the microscopic molecular arrangement, and excited-state dynamics are essential for their prospective applications [1][2][3][4][5][6]. Zinc phthalocyanines (ZnPc) present of particular interest due to their high absorption coefficient and high energy conversion efficiency in UV-VIS range.…”

Section: Introductionmentioning

confidence: 99%

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Annealing-induced phase transition in zinc phthalocyanine ultrathin films

Ahn

Chu

2016

Opt. Mater. Express

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We report the evidence of post-annealing-induced phase transition in zinc phthalocyanine (ZnPc) ultrathin (~20 nm) films upon annealing at 200 °C. The signatures of phase transition are observed in their morphological, structural, and ultrafast spectroscopic properties. X-ray diffraction measurement shows that α-phase nanospheres transform to βphase nanorods that have a high degree of crystallinity with an excellent ordering along the cdirection in a monoclinic arrangement. Tight packing of molecules in the β-crystallites allows a red-shift and intensity gain of the lowest-energy subband in the Q-band and subsequently increases the electronic coupling in both intercolumn and intracolumn paths.

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Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Annealing-induced phase transition in zinc phthalocyanine ultrathin films

Ahn

Chu

2016

Opt. Mater. Express

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“…27 Similar behavior was also observed in several studies with zinc phthalocyanines at high concentrations or with zinc phthalocyanine thin films. [29][30][31][32] In addition, a strong stimulated emission signal observed for ZnPc in THF at 720 nm was not observed in peptide encapsulated ZnPc samples, which is consistent with the fluorescence quenching observed in the peptide samples ( Figs S21 and S22 †).…”

Section: Spectroscopic Characterizationsupporting

confidence: 86%

Encapsulation of a zinc phthalocyanine derivative in self-assembled peptide nanofibers

et al. 2012

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Cataloged from PDF version of article.In this article, we demonstrate encapsulation of octakis(hexylthio) zinc phthalocyanine molecules by non-covalent supramolecular organization within self-assembled peptide nanofibers. Peptide nanofibers containing octakis(hexylthio) zinc phthalocyanine molecules were obtained via a straight-forward one-step self-assembly process under aqueous conditions. Nanofiber formation results in the encapsulation and organization of the phthalocyanine molecules, promoting ultrafast intermolecular energy transfer. The morphological, mechanical, spectroscopic and non-linear optical properties of phthalocyanine containing peptide nanofibers were characterized by TEM, SEM, oscillatory rheology, UV-Vis, fluorescence, ultrafast pump-probe and circular dichroism spectroscopy techniques. The ultrafast pump-probe experiments of octakis(hexylthio) zinc phthalocyanine molecules indicated pH controlled non-linear optical characteristics of the encapsulated molecules within self-assembled peptide nanofibers. This method can provide a versatile approach for bottom-up fabrication of supramolecular organic electronic devices. © 2012 The Royal Society of Chemistry

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“…Thanks to their πelectron conjugation, Pcs can readily undergo electron transfer reactions (3). There are two main substitution patterns for Pcs: Peripheral (2, 9(10), 16 (17), 23 (24)) and non-peripheral (1, 8(11), 15 (18), 22 (25)) and these patterns allow for greater solubility in organic solvents, thereby increasing the spectral behaviors and applications (4)(5)(6)(7)(8). To synthesize substituted Pcs, a reaction called cyclotetramerization must be exercised, and substituted phthalonitriles will give way to substituted phthalocyanines.…”

Section: Introductionmentioning

confidence: 99%

“…Photovoltaics, molecular transistors, light-emitting devices, and other molecular electronic applications (24,25) use organic materials, which are capable of absorbing various wavelengths of visible light and fluorescence highly efficiently. Since Pcs highly absorb in the Soret band of ultraviolet spectrum (about 300-400 nm), they are considered as efficient energy acceptors and they provide the required overlap between the emission spectrum of the donor and the absorption spectrum of the acceptor.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photophysical properties of A3B-type non-symmetrically substituted anthracene-based zinc(II) phthalocyanine

Temizel

Sevim

2020

Journal of the Turkish Chemical Society Section A: Chemistry

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A novel unsymmetrical zinc(II) phthalocyanine (ZnPc) (3) with an alkynyl functional group was prepared by an efficient mixed statistical condensation of 4-((4-ethynylbenzyl)oxy)phthalonitrile (1) and 4-(4-tertbutylphenoxy)phthalonitrile (2). FTIR, 1 H NMR, UV-Vis, elemental analysis, and MALDI-TOF were used to characterize this new compound. Working with different concentrations, the compound's aggregation properties were investigated and concluded that no aggregation tendency has been observed in the studied concentration range (1.0 x 10 -6 M to 1.2 x10 -5 M). Fluorescent quantum yields and lifetimes of the compound were studied and found to be 0.09 and 0.57 ns, respectively. As a fluorescent quencher, 1,4-benzoquinone was used in the experiments at differing concentrations in tetrahydrofuran. The kq values showed a close follow-up to the diffusion control limits, around 10 11 s -1 and they seem to agree with Einstein-Smoluchowski's approximation for bimolecular, diffusion-control-including, interactions. For the new compound, the KSV value was calculated as 27.55, which is lower than that of unsubstituted ZnPc. The fluorescence of the studied compound 3 was effectively quenched by 1,4-benzoquinone.

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Ultrafast excitation relaxation in titanylphthalocyanine thin film

Cited by 18 publications

References 25 publications

Annealing-induced phase transition in zinc phthalocyanine ultrathin films

Annealing-induced phase transition in zinc phthalocyanine ultrathin films

Encapsulation of a zinc phthalocyanine derivative in self-assembled peptide nanofibers

Synthesis and photophysical properties of A3B-type non-symmetrically substituted anthracene-based zinc(II) phthalocyanine

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