Energy Transfer in Dendritic Macromolecules:  Molecular Size Effects and the Role of an Energy Gradient

1996 ◽  
Vol 118 (40) ◽  
pp. 9635-9644 ◽  
Author(s):  
Chelladurai Devadoss ◽  
P. Bharathi ◽  
Jeffrey S. Moore
Keyword(s):  
Energy Transfer ◽  
Size Effects ◽  
Molecular Size ◽  
Dendritic Macromolecules ◽  
Energy Gradient

Dipole-Dipole Transport of Excitation in Liquid Solutions: Influence of Multi-Stage Energy Transfer on Donor Photoluminescence Yield

1989 ◽  
Vol 44 (9) ◽  
pp. 821-824 ◽  
Author(s):  
J. Kuśba
Keyword(s):  
Energy Transfer ◽  
Diffusion Coefficients ◽  
Size Effects ◽  
Molecular Size ◽  
Quantum Yields ◽  
Transfer Rates ◽  
Multi Stage ◽  
Donor And Acceptor ◽  
Liquid Solutions ◽  
Dipole Energy

Abstract On the basis of expressions obtained earlier, numerical calculations of relative donor quantum yields in the presence of multi-stage dipole-dipole energy transfer and material diffusion are carried out. Transfer rates of the second order obtained from the numerical solution of the diffusion equation with reflecting boundary conditions are used in the calculations. The results reflect the influence of donor and acceptor concentration, magnitude of diffusion coefficients and molecular size effects.

Adiabatic large polarons in anisotropic molecular crystals

2011 ◽  
Vol 35 (1) ◽  
pp. 15-27
Author(s):  
Zoran Ivić ◽  
Željko Pržulj
Keyword(s):  
Energy Transfer ◽  
Effective Mass ◽  
Molecular Crystals ◽  
Single Chain ◽  
Proper Understanding ◽  
One Dimensional ◽  
Interchain Coupling ◽  
Large Polaron ◽  
The One

Adiabatic large polarons in anisotropic molecular crystals We study the large polaron whose motion is confined to a single chain in a system composed of the collection of parallel molecular chains embedded in threedimensional lattice. It is found that the interchain coupling has a significant impact on the large polaron characteristics. In particular, its radius is quite larger while its effective mass is considerably lighter than that estimated within the one-dimensional models. We believe that our findings should be taken into account for the proper understanding of the possible role of large polarons in the charge and energy transfer in quasi-one-dimensional substances.

Photon upconversion in multicomponent systems: Role of back energy transfer

2020 ◽  
Vol 153 (11) ◽  
pp. 114302
Author(s):  
Diletta Meroni ◽  
Angelo Monguzzi ◽  
Francesco Meinardi
Keyword(s):  
Energy Transfer ◽  
Multicomponent Systems ◽  
Back Energy Transfer

scholarly journals Electrochemiluminescence Study of Europium (III) Complex with Coumarin3-Carboxylic Acid

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Stefan Lis ◽  
Krzysztof Staninski ◽  
Tomasz Grzyb
Keyword(s):  
Aqueous Solution ◽  
Spectral Analysis ◽  
Energy Transfer ◽  
Solid State ◽  
Carboxylic Acid ◽  
Elemental Analysis ◽  
Aluminium Electrode ◽  
The Eu

The europium (III) complex of coumarin-3-carboxylic acid (C3CA) has been prepared and characterized on the basis of elemental analysis, IR, and emission (photoluminescence and electrochemiluminescence) spectroscopy. The synthesised complex having a formula Eu was photophysically characterized in solution and in the solid state. Electrochemiluminescence, ECL, of the system containing the Eu(III)/C3CA complex was studied using an oxide-covered aluminium electrode. The goal of these studies was to show the possibility of the use of electrochemical excitation of the Eu(III) ion in aqueous solution for emission generation. The generated ECL emission was very weak, and therefore its measurements and spectral analysis were carried out with the use of cut-off filters method. The studies proved a predominate role of the ligand-to-metal energy transfer (LMET) in the generated ECL.

Role of a 3D Structure in Energy Transfer in Mixed-Ligand Metal–Organic Frameworks

2021 ◽  
Author(s):  
Shaunak M. Shaikh ◽  
Stefan Ilic ◽  
Bradley J. Gibbons ◽  
Xiaozhou Yang ◽  
Elena Jakubikova ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Metal Organic Frameworks ◽  
3D Structure ◽  
Mixed Ligand ◽  
Metal Organic

Probing the microscopic structural organization of neat ionic liquids (ILs) and ionic liquid-based gels through resonance energy transfer (RET) studies

2017 ◽  
Vol 19 (34) ◽  
pp. 23194-23203 ◽  
Author(s):  
Debashis Majhi ◽  
Moloy Sarkar
Keyword(s):  
Ionic Liquid ◽  
Energy Transfer ◽  
Ionic Liquids ◽  
Structural Organization ◽  
Rhodamine 6G ◽  
Resonance Energy Transfer ◽  
Resonance Energy

With the aim to understand the role of the ionic constituents of ionic liquids (ILs) in their structural organization, resonance energy transfer (RET) studies between ionic liquids (donor) and rhodamine 6G (acceptor) have been investigated.

scholarly journals Insights into the role of protein molecule size and structure on interfacial properties using designed sequences

2013 ◽  
Vol 10 (80) ◽  
pp. 20120987 ◽  
Author(s):  
Mirjana Dimitrijev Dwyer ◽  
Lizhong He ◽  
Michael James ◽  
Andrew Nelson ◽  
Anton P. J. Middelberg
Keyword(s):  
Stress Response ◽  
Molecular Size ◽  
Interfacial Properties ◽  
Protein Molecule ◽  
Mixed System ◽  
Free Energy Of Adsorption ◽  
Air Water Interface ◽  
A Chain ◽  
Size And Structure

Mixtures of a large, structured protein with a smaller, unstructured component are inherently complex and hard to characterize at interfaces, leading to difficulties in understanding their interfacial behaviours and, therefore, formulation optimization. Here, we investigated interfacial properties of such a mixed system. Simplicity was achieved using designed sequences in which chemical differences had been eliminated to isolate the effect of molecular size and structure, namely a short unstructured peptide (DAMP1) and its longer structured protein concatamer (DAMP4). Interfacial tension measurements suggested that the size and bulk structuring of the larger molecule led to much slower adsorption kinetics. Neutron reflectometry at equilibrium revealed that both molecules adsorbed as a monolayer to the air–water interface (indicating unfolding of DAMP4 to give a chain of four connected DAMP1 molecules), with a concentration ratio equal to that in the bulk. This suggests the overall free energy of adsorption is equal despite differences in size and bulk structure. At small interfacial extensional strains, only molecule packing influenced the stress response. At larger strains, the effect of size became apparent, with DAMP4 registering a higher stress response and interfacial elasticity. When both components were present at the interface, most stress-dissipating movement was achieved by DAMP1. This work thus provides insights into the role of proteins' molecular size and structure on their interfacial properties, and the designed sequences introduced here can serve as effective tools for interfacial studies of proteins and polymers.

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