We have prepared mixed phthalocyanine films out of MnPc and F(16)CoPc, which were characterized by means of photoemission spectroscopy and electron energy-loss spectroscopy. Our data reveal the formation of MnPc/F(16)CoPc charge transfer dimers in analogy to the related heterojunction. The electronic excitation spectrum of these blends is characterized by a new low energy excitation at 0.6 eV. Density functional theory calculations show that the new signal is caused by a strong absorption between the states of the interface induced two level system.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/1.4774060 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Excimer formation in zinc-phthalocyanine revealed using ultrafast electron diffraction.
Proc Natl Acad Sci U S A
December 2024
Department of Physics, Centre for the Physics of Materials, McGill University, Montreal, QC H3A OB8, Canada.
The formation of excited dimer states, so called excimers, is an important phenomenon in many organic molecular semiconductor solid state aggregates. In contrast to Frenkel exciton-polarons, an excimer is long-lived and energetically low-lying due to stabilization resulting from a substantial reorganization of the intermolecular geometry. Here, we show that ultrafast electron diffraction can follow the dynamics of solid-state excimer formation in polycrystalline thin films of a molecular semiconductor, revealing both the key reaction modes and the eventual structure of the emitting state.
View Article and Find Full Text PDFTwo Approaches to the Synthesis of Redox-Switchable 5,10,20-Triaryl-5,15-diazaporphyrinoids.
Chem Asian J
November 2024
Department of Chemistry, Faculty of Science, Niigata University, Nishi-ku, Niigata, 950-2181, Japan.
Despite the significant development and extensive application of phthalocyanine and related azaporphyrins, little attention has been paid to meso-N-substituted azaporphyrinoids. Here, we report new derivatives of 5,10,20-triaryl-5,15-diazaporphyrinoids (ArDAP), which are reversibly redox-switchable between the 18π- and 19π-electron state. Four kinds of metal(II) complexes and free bases of ArDAP were prepared by metal-templated cyclization of metal(II) complexes of 5,10,15-triaryl-10-azabiladiene-ac with sodium azide or copper-catalyzed N-phenylation of 10,20-diaryl-5,15-diazaporphyrins (ArDAP) with diphenyliodonium hexafluorophosphate.
View Article and Find Full Text PDFCan the use of iron phthalocyanine-derivative mouthrinses in COVID-19 patients provide systemic benefits? Research into this potential should be considered.
GMS Hyg Infect Control
October 2024
Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
Aim: The purpose of this brief report is to discuss the impact of an oral rinse and spray containing an iron phthalocyanine derivative as an additional therapy in hospitalized COVID-19 patients.
Methods: In the first study by this group of authors published on this topic, the clinical status of 22 patients with COVID-19 who were hospitalized and receiving PDMS (phthalocyanine derivative mouth spray) was assessed using the Karnofsky scale (KS) for thtree days (D0, D2, and D4). In another study, the laboratory data (CBC, D-dimer, Ferritin, and C-reactive protein [CRP]) of 41 patients hospitalized with COVID-19 who took part in a randomized clinical trial with an MIPD (mouthwash with iron phthalocyanine derivative) were evaluated retrospectively on the first day of intervention (D1) and 48 hours later (D2).
Immobilising an acid-cleavable dimeric phthalocyanine on gold nanobipyramids for intracellular pH detection and photodynamic elimination of cancer cells.
Analyst
June 2024
Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
An acetal-linked dimeric phthalocyanine has been synthesised and immobilised on the surface of gold nanobipyramids. The resulting nanocomposite serves as a highly sensitive probe for intracellular pH through its acid-responsive fluorescence and surface-enhanced Raman scattering signals. The phthalocyanine units released in the acidic intracellular environment can also effectively eliminate the cancer cells upon light irradiation, rendering this simple fabricated nanosystem a bimodal and bifunctional theranostic agent.
View Article and Find Full Text PDFIron(II) Phthalocyanine-Catalyzed Homodimerization and Tandem Diamination of Diazo Compounds with Primary Amines: Access to Construct Substituted 2,3-Diaminosuccinonitriles in One-Pot.
J Org Chem
June 2024
Department of Chemistry & Bioengineering, Yichun Key Laboratory of Applied Chemistry, Key Laboratory of Jiangxi University for Applied Chemistry & Chemical Biology, Yichun University, Yichun 336000, China.
We herein first report the homodimerization and tandem diamination of diazo compounds with primary amines catalyzed by the iron(II) phthalocyanine (PcFe(II)), which can construct one C-C bond and two C-N bonds within 20 min in one-pot. Compared to the traditional metal-catalyzed N-H insertion reaction between amines with diazo reagents, the developed reaction almost does not generate the N-H insertion product, but the homodimerization/tandem diamination product. The proposed mechanism studies indicate that primary amines play a crucial role in the homocoupling of diazo compounds via dimerization of iron(III)-acetonitrile radical generated from the reaction between diazoacetonitrile with PcFe(II) coordinated by bis(amines); the β-hydride elimination is involved, and then, the attack of primary amines toward the carbon atoms on the formed C-C bond is followed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!