Excited state vs. photoinduced charge separation in bundles of a polyamide containing pendant AlIII phthalocyaninetetrasulfonate groups. Potential applications to photocatalysis

Photoinduced charge separation and dark charge recombination occurring within picoseconds is observed in newly synthesized triphenylamine–thiophene-Sc3N@Ih-C80 and triphenylamine–thiophene-C60 conjugates.

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Photoinduced charge separation in a PtII acetylide donor–acceptor triad based on 2-(1-pyrazole)-pyridine modified with naphthalene mono-imide electron acceptor

Pure and Applied Chemistry ◽

10.1351/pac-con-13-04-02 ◽

2013 ◽

Vol 85 (7) ◽

pp. 1331-1348 ◽

Cited By ~ 9

Author(s):

Igor V. Sazanovich ◽

Mohammed A. H. Alamiry ◽

Anthony J. H. M. Meijer ◽

Michael Towrie ◽

E. Stephen Davies ◽

...

Keyword(s):

Electron Transfer ◽

Excited State ◽

Electron Acceptor ◽

Charge Separation ◽

Transient Absorption ◽

Initial Population ◽

Large Shift ◽

Photoinduced Charge Separation ◽

Donor Acceptor ◽

Photoinduced Charge

A class of molecular electron transfer cascades—those based on PtII complexes of 2-(1-pyrazole)-pyridine (pzpy) ligands—are reported. The synthesis of a new electron-acceptor imide-modified pzpy ligands is reported, and their application to transition-metal chemistry demonstrated by the synthesis of the PtII chloride and acetylide complexes. These donor–acceptor assemblies are promising models for investigation of photoinduced charge separation. Accordingly, picosecond time-resolved infrared (TRIR) and femtosecond transient absorption (TA) studies have been undertaken to elucidate the nature and dynamics of the lowest excited states in Pt(NAP-pyr-pyrazole)(–CC–Ph–C7H15)2. It has been established that the initial population of an MLL'CT excited state in the chromophoric [Pt(pyridine-pyrazole)(acetylide)] core is followed by an electron transfer to the naphthalimide (NAP) acceptor, forming a charge-separated state. This state is characterized by a large shift in ν(CO) vibrations of the NAP acceptor, as well as by a very intense and broad [×10 times in comparison to ν(CO)] asymmetric acetylide stretch which incorporates –CC–Pt–CC– framework and occurs at approximately 300 cm–1 lower in energy than its ground-state counterpart. In CH2Cl2 at room temperature, the charge-separated state with the lifetime of 150 ps collapses into an almost isoenergetic NAP-localized triplet state; the rate of this transformation changes upon decreasing the temperature to 263 K. This final excited state, 3NAP-(pyr-pyrazole)Pt(–CC–Ph–C7H15)2, has an unusually long, for PtII complexes, excited-state lifetime of tens of microseconds. The work demonstrates the possibility of tuning excited-state properties in this new class of PtII chromophores designed for electron-transfer cascades.

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Anionic Fluorinated Zn-porphyrin Combined with Cationic Endohedral Li-fullerene for Long-Lived Photoinduced Charge Separation with Low Energy Loss

The Journal of Physical Chemistry B ◽

10.1021/acs.jpcb.0c10450 ◽

2021 ◽

Vol 125 (3) ◽

pp. 918-925

Author(s):

Kazuhira Miwa ◽

Shinobu Aoyagi ◽

Takahiro Sasamori ◽

Hiroshi Ueno ◽

Hiroshi Okada ◽

...

Keyword(s):

Energy Loss ◽

Charge Separation ◽

Low Energy ◽

Photoinduced Charge Separation ◽

Photoinduced Charge

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Photoinduced charge separation in microporous and mesoporous materials

Canadian Journal of Chemistry ◽

10.1139/v10-127 ◽

2011 ◽

Vol 89 (3) ◽

pp. 257-265 ◽

Cited By ~ 3

Author(s):

Ranjit T. Koodali

Keyword(s):

Mesoporous Materials ◽

Charge Separation ◽

Organic Molecules ◽

Microporous Materials ◽

Photoinduced Charge Separation ◽

Photoinduced Charge ◽

Mcm 41

A review of photoinduced charge separation of organic molecules in microporous and mesoporous materials is presented. In particular, the photoionization of N-alkylphenothiazine (PCn), N,N,N′,N′-tetramethylbenzidine (TMB), and porphyrin in microporous materials, such as zeolites, aluminophosphates (AlPOs), silicoaluminophosphates (SAPOs), and mesoporous materials, such as MCM-41, MCM-48, and SBA-15, is discussed.

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Exciplexes versus Loose Ion Pairs: How Does the Driving Force Impact the Initial Product Ratio of Photoinduced Charge Separation Reactions?

The Journal of Physical Chemistry Letters ◽

10.1021/jz501575r ◽

2014 ◽

Vol 5 (18) ◽

pp. 3188-3194 ◽

Cited By ~ 17

Author(s):

Hao Minh Hoang ◽

Thi Bich Van Pham ◽

Günter Grampp ◽

Daniel R. Kattnig

Keyword(s):

Charge Separation ◽

Driving Force ◽

Ion Pairs ◽

Initial Product ◽

Product Ratio ◽

Photoinduced Charge Separation ◽

Force Impact ◽

Photoinduced Charge

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Photoinduced charge separation in self-assembled cofacial pentamers of zinc-5,10,15,20-tetrakis(perylenediimide)porphyrin

Physical Chemistry Chemical Physics ◽

10.1039/b617876f ◽

2007 ◽

Vol 9 (12) ◽

pp. 1469 ◽

Cited By ~ 46

Author(s):

Michael J. Ahrens ◽

Richard F. Kelley ◽

Zachary E. X. Dance ◽

Michael R. Wasielewski

Keyword(s):

Charge Separation ◽

Photoinduced Charge Separation ◽

Self Assembled ◽

Photoinduced Charge

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The direct observation of charge separation dynamics in CdSe quantum dots/cobaloxime hybrids

Physical Chemistry Chemical Physics ◽

10.1039/c5cp07611k ◽

2016 ◽

Vol 18 (6) ◽

pp. 4300-4303 ◽

Cited By ~ 5

Author(s):

J. Huang ◽

Y. Tang ◽

K. L. Mulfort ◽

X. Zhang

Keyword(s):

Quantum Dots ◽

Quantum Dot ◽

Charge Separation ◽

Cdse Quantum Dots ◽

X Ray ◽

Molecular Catalyst ◽

Cdse Quantum Dot ◽

Photoinduced Charge Separation ◽

X Ray Absorption ◽

Photoinduced Charge

In this work, we investigated photoinduced charge separation dynamics in a CdSe quantum dot/cobaloxime molecular catalyst hybrid using the combination of transient optical (OTA) and X-ray absorption (XTA) spectroscopy.

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