Synthesis and Near-Infrared Luminescence of a Deuterated Conjugated Porphyrin Dimer for Probing the Mechanism of Non-Radiative Deactivation (Postprint). PDF Download
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Languages : en
Pages : 9
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Book Description
Beta-meso-beta-Fused porphyrin oligomers have many attractive photophysical features such as strong absorption in the near-IR at wavelengths greater than 1000 nm, and high two-photon cross sections. However their ultrafast S(sub-1)-S(sub-0) deactivation limits potential applications. We have synthesised a deuterated fused porphyrin dimer to test whether deuteration influences the rate of non-radiative deactivation. An efficient synthetic strategy was developed, starting with deuteration of dipyrromethane. Deuteration of the zinc porphyrin dimer does not affect its fluorescence quantum yield in CD2Cl2. This implies that the ultrafast non-radiative deactivation is not simply a consequence of the small S(sub-1)-S(sub-0) energy gaps to the beta-meso-beta-fused porphyrin oligomers but with slower rates of S(sub-1)-S(sub-0) decay.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Beta-meso-beta-Fused porphyrin oligomers have many attractive photophysical features such as strong absorption in the near-IR at wavelengths greater than 1000 nm, and high two-photon cross sections. However their ultrafast S(sub-1)-S(sub-0) deactivation limits potential applications. We have synthesised a deuterated fused porphyrin dimer to test whether deuteration influences the rate of non-radiative deactivation. An efficient synthetic strategy was developed, starting with deuteration of dipyrromethane. Deuteration of the zinc porphyrin dimer does not affect its fluorescence quantum yield in CD2Cl2. This implies that the ultrafast non-radiative deactivation is not simply a consequence of the small S(sub-1)-S(sub-0) energy gaps to the beta-meso-beta-fused porphyrin oligomers but with slower rates of S(sub-1)-S(sub-0) decay.
Author: Wendy A. Warr
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ISBN:
Category : Science
Languages : en
Pages : 292
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Book Description
Author: Alex Edward Samuel Green
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ISBN:
Category : Science
Languages : en
Pages : 418
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Book Description
The radiation from the sun / R. Tousey -- Atomic and molecular species / R.T. Brinkman, J. Dowling, Jr., A.E.S. Green, and A.T. Jusick -- The present status of calculations of properties of N2 and O2 / K. Ohno -- Atmospheric ozone / M. Griggs -- The radiance of the earth in the middle ultraviolet / A.E.S. Green -- Second-order-scattering contribution to the earth's radiance in the middle ultraviolet / J. Dowling, Jr., and A.E.S. Green -- A generalized chapman function / A.E.S. Green and J.D. Martin -- The middle ultraviolet and air pollution / A.E.S. Green, D.T. Williams, R.S. Sholtes, and J. Dowling, Jr. -- Electron impact excitation of the ultraviolet / A.E.S/ Green and R.S. Stolarski -- The ultraviolet spectroscopy of planets /C.A. Barth -- Astronomical ultraviolet radiation / K.L. Hallam -- Radiation from flames and chemical perturbation of the atmosphere /A.L. Berlad -- Gasdynamics of rocket exhaust plumes.
Author: Christian Weinberger
Publisher:
ISBN: 9783039288960
Category :
Languages : en
Pages : 128
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Book Description
With pore sizes up to 100 nm, the term "nanoporous" covers a wide range of material classes. A broad field of applications has arisen from the diversity of unique structures and properties of nanoporous materials. Recent research spans the range from fundamental studies of the behavior of atoms and molecules in confined space, creative synthetic pathways for novel materials, to applications in high-performance technologies. This Special Issue collects current studies about the progress in the development, characterization, and application of nanoporous materials, including (but not restricted to) mesoporous silica, carbon and metal oxides, porous coordination polymers, metal organic frameworks (MOFs), and covalent organic frameworks (COFs), as well as materials exhibiting hierarchical porosity. Their functionalities show promise for fields such as energy storage/conversion (e.g., photocatalysis and battery electrodes), sensing, catalysis, and their sorption properties for N2, CO2, NOx, or H2O, to name just a few.
