scholarly journals Fluorescence emission of self‐assembling amyloid‐like peptides: solution versus solid state

ChemPhysChem ◽  
2021 ◽  
Author(s):  
Carlo Diaferia ◽  
Chiara Schiattarella ◽  
Enrico Gallo ◽  
Bartolomeo Della Ventura ◽  
Giancarlo Morelli ◽  
...  
Keyword(s):  
Solid State ◽  
Fluorescence Emission ◽  
Solution Versus ◽  
Self Assembling

scholarly journals Impact of nanosizing a host matrix based on a metal–organic framework on solid-state fluorescence emission and energy transfer

2022 ◽  
Author(s):  
Hikaru Sakamoto ◽  
Akitaka Ito ◽  
Masataka Ohtani
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Metal Organic Framework ◽  
Fluorescence Emission ◽  
Dye Molecules ◽  
Host Matrix ◽  
Metal Organic ◽  
Solid State Fluorescence ◽  
Organic Framework

We demonstrate that the nanosize effect appears to affect the properties of dye molecules encapsulated in the pores of a metal–organic framework (dye@MOF). The emissive properties of the nanosized dye@MOF...

Studies on fluorescence of cellulosics

Holzforschung ◽  
2007 ◽  
Vol 61 (5) ◽  
pp. 504-508 ◽  
Author(s):  
Alain Castellan ◽  
Reinaldo Ruggiero ◽  
Elisabete Frollini ◽  
Ludmila A. Ramos ◽  
Christine Chirat
Keyword(s):  
Solid State ◽  
Microcrystalline Cellulose ◽  
Woody Plants ◽  
Average Molecular Weight ◽  
Homogeneous Medium ◽  
Fluorescence Emission ◽  
Excitation Wavelength ◽  
Experimental Conditions ◽  
Fluorescence Emission Spectra ◽  
Cotton Linters

Abstract Steady-state fluorescence emission spectra of various celluloses were measured at an excitation wavelength of 320 nm. Various spectra recorded in the solid state were compared: (1) ECF bleached papers made of hardwood, the anhydroglucose units of which were chemically modified at C1 and C6 or C2 and C3 positions with carboxylic groups; (2) microcrystalline cellulose; (3) cotton linters; and (4) delignified sisal fibers (mercerized or not). Fluorescence emission was quite independent of the carboxylic acid content and average molecular weight (determined by viscosimetry) of the cellulose polymers. Microcrystalline cellulose (Avicel), cotton linters, and mercerized delignified sisal cellulose were acetylated in homogeneous medium (DMAc/LiCl as solvent system) to obtain soluble polymers in dichloromethane for comparison of spectra recorded in the solid and liquid states. Fluorescence of cellulose acetates in solution (CH2Cl2) and in the solid state was compared under similar experimental conditions to non-esterified celluloses in the solid state. The importance of the solid state for fluorescence emission could be demonstrated. Fluorophores are present in minute amounts in the polymer and their favorable energy transfer for excitation in the solid state likely enhances fluorescence emission. Among numerous fluorophores, dityrosine appeared to be a good candidate for fluorescence because it displayed emission in the fluorescence range of cellulose. Dityrosine is an amino acid involved in the lignification of non-woody plants. Mercerized sisal impregnated with tyrosine in the presence of peroxidase and hydrogen peroxide did not show enhanced emission, in contrast to para-hydroxycinnamic acid (coumaric acid), which is also involved in the lignification process at least for non-woody plants. The origin of cellulose fluorescence remains uncertain and appears to have several origins. This study clearly underlines the importance of the solid state for enhancing fluorophore emission.

Solid State Fluorescence Emission of Aflatoxins on Silica Gel

1968 ◽  
Vol 51 (6) ◽  
pp. 1190-1192
Author(s):  
James A Robertson ◽  
Walter A Pons
Keyword(s):  
Solid State ◽  
Silica Gel ◽  
Fluorescence Emission ◽  
Solid State Fluorescence

Abstract The solid state fluorescence emission maxima of aflatoxins B1, B2, G1, and G2 on silica gel range from 427 to 455 mµ, with excitation maxima at 368—369 mµ. Both the order and the magnitude of the relative fluorescence intensities of individual aflatoxins are different in solution and in the solid state on silica gel.

Hydrogen bonded dimers of ketocoumarin in the solid state and alcohol:water binary solvent: fluorescence spectroscopy, crystal structure and DFT investigation

2019 ◽  
Vol 43 (23) ◽  
pp. 9090-9105 ◽  
Author(s):  
Kannan Ramamurthy ◽  
E. J. Padma Malar ◽  
Chellappan Selvaraju
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Binary Mixture ◽  
Fluorescence Spectroscopy ◽  
Emission Spectrum ◽  
Fluorescence Emission ◽  
Binary Solvent ◽  
Fluorescence Emission Spectrum ◽  
Hydrogen Bonded

Fluorescence emission spectrum of ketocoumarin dimers in an alcohol:water binary mixture and the solid state.

Highly fluorescent solid-state benzothiadiazole derivatives as saturated red emitters for efficient solution-processed non-doped electroluminescent devices

2020 ◽  
Vol 8 (30) ◽  
pp. 10464-10473 ◽  
Author(s):  
Taweesak Sudyoadsuk ◽  
Pongsakorn Chasing ◽  
Chaiyon Chaiwai ◽  
Thanyarat Chawanpunyawat ◽  
Terdkait Kaewpuang ◽  
...  
Keyword(s):  
Solid State ◽  
Efficient Solution ◽  
Fluorescence Emission ◽  
Solution Processed ◽  
Electroluminescent Devices ◽  
Red Fluorescence

Benzothiadiazole derivatives exhibit strong solid-state red fluorescence emission with bipolar properties.

Tuning the fluorescence emission in mononuclear heteroleptic trigonal silver(i) complexes

2017 ◽  
Vol 41 (8) ◽  
pp. 3006-3014 ◽  
Author(s):  
Sara Durini ◽  
G. Attilio Ardizzoia ◽  
Bruno Therrien ◽  
Stefano Brenna
Keyword(s):  
Solid State ◽  
Electronic Properties ◽  
Fluorescence Emission ◽  
Luminescent Behavior ◽  
Tunable Emission

Mononuclear heteroleptic trigonal planar silver(i) complexes have been prepared and characterized, both in solution and in the solid state. Their luminescent behavior was investigated, showing a tunable emission maxima according to the electronic properties of the phosphorous ligand, in the solid state.

Robust Circular Polarized Emission from Nanoscopic Single-Molecule Sources: Application to Solid State Devices

2006 ◽  
Vol 965 ◽  
Author(s):  
Ruthanne Hassey ◽  
Ellen J Swain ◽  
Nathan I Hammer ◽  
Emily L Richards ◽  
Dhandapani Venkataraman ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Solid State ◽  
Single Molecule ◽  
Polarization State ◽  
Fluorescence Emission ◽  
Polarization Component ◽  
Circularly Polarized ◽  
Solid State Devices ◽  
Polarized Emission ◽  
Circular Dichroïsm

ABSTRACTControlling the polarization state of fluorescence emission in solid state devices is an important goal in optical display technologies. High-purity (right or left) circular polarized emission is particularly desirable because an arbitrary linearly polarized state can be generated with much higher efficiency (lower loss) as compared with a non-polarized fluorescence input. Here we discuss observation of resonant chiroptical effects (fluorescence detected circular dichroism (FDCD), and circular polarized luminescence (CPL)) from single (bridged-triarylamine) helicene molecules in a solid-film format. In the FDCD experiment using 457-nm excitation – an excitation wavelength where the bulk circular dichroism is negligible – single-molecule fluorescence from enantiomerically pure helicene samples show surprising distribution of dissymmetry (g) parameters centered near zero but with a significant contribution from molecules showing an almost perfectly pure response to either right or left circularly polarized light. Experiments combining a well-defined circularly polarized excitation (either right or left) with decomposition of the fluorescence into left- and right-circular polarization component show only a weak correlation between the dissymmetry (sign and magnitude) of the CPL with the polarization state of the input. Current efforts are directed at wavelength resolved CPL, FDCD at wavelengths that are more closely match to bulk circular dichroism features, and orientational dependence of FDCD and CPL. These results provide new insight into chiroptical properties of chiral fluorophores at the single molecule level and suggests new optical device possibilities with chiral fluorophores.

A three-dimensional CdIIcoordination framework: poly[di-μ2-aqua-{μ2-1,4-bis[(1H-1,2,4-triazol-1-yl)methyl]benzene-κ2N4:N4′}di-μ3-terephthalato-κ3O:O′:O′′-dicadmium(II)]

2014 ◽  
Vol 70 (11) ◽  
pp. 1025-1028
Author(s):  
Hong Shen
Keyword(s):  
Solid State ◽  
Thermogravimetric Analysis ◽  
Room Temperature ◽  
Three Dimensional ◽  
Fluorescence Emission ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Strong Fluorescence ◽  
X Ray ◽  
Methyl Benzene

The title CdIIcoordination polymer, [Cd(C10H8O4)(C12H12N6)0.5(H2O)]n, has been obtained by the hydrothermal method and studied by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy and fluorescence spectroscopy. The compound forms a novel three-dimensional framework with 3,8-connected three-dimensional binodal {4.52}2{42.510.612.7.83} topology. An investigation of its photoluminescence properties shows that the compound exhibits a strong fluorescence emission in the solid state at room temperature.

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