Browsing CHEM Faculty Scholarship by Author "El-Khouly, Mohamed E."
Now showing items 1-12 of 12
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Bisdonor-azaBODIPY-fullerene supramolecules: syntheses, characterization, and light-Induced electron-transfer studies
Bandi, Venugopal; El-Khouly, Mohamed E.; Ohkubo, Kei; Nesterov, Vladimir N.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (American Chemical Society, 2014-02-06)Achieving ultrafast light-induced charge separation requires carefully selected donor and acceptor entities often held together in a closer proximity. In the present investigation, two tetrads featuring a near-IR-emitting ... -
Charge stabilization in a closely spaced ferrocene-boron dipyrrin-fullerene triad
Wijesinghe, Channa A.; El-Khouly, Mohamed E.; Blakemore, James D.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (Royal Society of Chemistry, 2010-05-21)New molecular triads composed of closely spaced ferrocene-boron dipyrrin-fullerene, 1 and triphenylamine-boron dipyrrin-fullerene, 2 are synthesized, and photoinduced electron transfer leading to charge stabilization is ... -
A charge-stabilizing, multimodular, ferrocene-bis(triphenylamine)-zinc-porphyrin-fullerene polyad
Wijesinghe, Channa A.; El-Khouly, Mohamed E.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2013-07-15)A novel multimodular donor-acceptor polyad featuring zinc porphyrin, fullerene, ferrocene, and triphenylamine entities was designed, synthesized, and studied as a charge-stabilizing, photosynthetic-antenna/reaction-center ... -
Control over photoinduced energy and electron transfer in supramolecular polyads of covalently linked azaBODIPY-bisporphyrin ‘molecular clip’ hosting fullerene
D'Souza, Francis; Amin, Anu N.; El-Khouly, Mohamed E.; Subbaiyan, Navaneetha K.; Zandler, Melvin E.; Fukuzumi, Shunichi (American Chemical Society, 2012-01)A 'molecular clip' featuring a near-IR emitting fluorophore, BF(2)-chelated tetraarylazadipyrromethane (aza-BODIPY) covalently linked to two porphyrins (MP, M = 2H or Zn) has been newly synthesized to host a three-dimensional ... -
Excitation-wavelength-dependent, ultrafast photoinduced electron transfer in bisferrocene/bf2-chelated-azadipyrromethene/fullerene tetrads
Bandi, Venugopal; El-Khouly, Mohamed E.; Ohkubo, Kei; Nesterov, Vladimir N.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (John Wiley and Sons, 2013-05-27)Donor–acceptor distance, orientation, and photoexcitation wavelength are key factors in governing the efficiency and mechanism of electron-transfer reactions both in natural and synthetic systems. Although distance and ... -
Near-IR excitation transfer and electron transfer in a BF2-chelated dipyrromethane-azadipyrromethane dyad and triad
El-Khouly, Mohamed E.; Amin, Anu N.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (WILEY-V C H VERLAG GMBH, 2012-04)A molecular dyad and triad, comprised of a known photosensitizer, BF2-chelated dipyrromethane (BDP), covalently linked to its structural analog and near-IR emitting sensitizer, BF2-chelated tetraarylazadipyrromethane (ADP), ... -
A novel BF(2)-chelated azadipyrromethene-fullerene dyad: synthesis, electrochemistry and photodynamics
Amin, Anu N.; El-Khouly, Mohamed E.; Subbaiyan, Navaneetha K.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (Royal Society of Chemistry, 2012)The synthesis, structure, electrochemistry and photodynamics of a BF2-chelated azadipyrromethene–fullerene dyad are reported in comparison with BF2-chelated azadipyrromethene without fullerene. The attachment of fullerene ... -
Photochemical charge separation in closely positioned donor-boron dipyrrin-fullerene triads
Wijesinghe, Channa A.; El-Khouly, Mohamed E.; Subbaiyan, Navaneetha K.; Supur, Mustafa; Zandler, Melvin E.; Ohkubo, Kei; Fukuzumi, Shunichi; D'Souza, Francis (John Wiley and Sons, 2011-02-14)A series of molecular triads, composed of closely positioned boron dipyrrin-fullerene units, covalently linked to either an electron donor (donor(1) -acceptor(1) -acceptor(2) -type triads) or an energy donor (antenna-donor(1) ... -
Probing the donor-acceptor proximity on the physicochemical properties of porphyrin-fullerene dyads: "tail-on" and "tail-off" binding approach
D'Souza, Francis; Deviprasad, Gollapalli R.; El-Khouly, Mohamed E.; Fujitsuka, Mamoru; Ito, Osamu (American Chemical Society, 2001-06-06)A new approach of probing proximity effects in porphyrin-fullerene dyads by using an axial ligand coordination controlled "tail-on" and "tail-off" binding mechanism is reported. In the newly synthesized porphyrin-fullerene ... -
Self-assembled via axial coordination magnesium porphyrin-imidazole appended fullerene dyad: spectroscopic, electrochemical, computational, and photochemical studies
D'Souza, Francis; El-Khouly, Mohamed E.; Gadde, Suresh; McCarty, Amy L.; Karr, Paul A.; Zandler, Melvin E.; Araki, Yasuyaki; Ito, Osamu (American Chemical Society, 2005-05-26)Spectroscopic, redox, and electron transfer reactions of a self-assembled donor-acceptor dyad formed by axial coordination of magnesium meso-tetraphenylporphyrin (MgTPP) and fulleropyrrolidine appended with an imidazole ... -
Syntheses, electrochemistry, and photodynamics of ferrocene-azadipyrromethane donor--acceptor dyads and triads
Amin, Anu N.; El-Khouly, Mohamed E.; Subbaiyan, Navaneetha K.; Zandler, Melvin E.; Supur, Mustafa; Fukuzumi, Shunichi; D'Souza, Francis (American Chemical Society, 2011-09-08)A near-IR-emitting sensitizer, boron-chelated tetraarylazadipyrromethane, has been utilized as an electron acceptor to synthesize a series of dyads and triads linked with a well-known electron donor, ferrocene. The structural ... -
Ultrafast photoinduced energy and electron transfer in multi-modular donor-acceptor conjugates
El-Khouly, Mohamed E.; Wijesinghe, Channa A.; Nesterov, Vladimir N.; Zandler, Melvin E.; Fukuzumi, Shunichi; D'Souza, Francis (Wiley-Blackwell, 2012-10)New multi-modular donoracceptor conjugates featuring zinc porphyrin (ZnP), catechol-chelated boron dipyrrin (BDP), triphenylamine (TPA) and fullerene (C60), or naphthalenediimide (NDI) have been newly designed and synthesized ...