Photoluminescence of Synthetic Polymers

Somersall, A. C.; Guillet, J. E.

doi:10.1080/15321797508080008

Cited by 37 publications

(16 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…wavelengths'] are to be expected." Somersall and Guillet (1975) Why should radiation be absorbed by some molecular structures and not by others? Sir William Bragg used the analogy to tuning forks which can be set in vibration when sound waves of the appropriate frequency pass through them (Bragg 1959).…”

Section: Discussionmentioning

confidence: 99%

Accelerated Aging, Photochemical and Thermal Aspects

Witte¹,

Feller²

1996

Studies in Conservation

View full text Add to dashboard Cite

The Getty Conservation Institute, an operating program of the J. Paul Getty Trust, is committed to raising public awareness of the importance of preserving cultural heritage worldwide and to furthering scientific knowledge and professional practice in the field of conservation. The Institute conducts research, training, documentation, and conservation activities in several major areas including objects and collections, archaeological sites and monuments, and historic buildings and sites. Research in Conservation This reference series is intended to make available the findings of research conducted by the Getty Conservation Institute and its individual and institutional research partners, as well as state-of-the-art reviews of conservation literature. Each volume covers a separate topic of current interest and concern to conservators.

show abstract

Section: Discussionmentioning

confidence: 99%

Accelerated Aging, Photochemical and Thermal Aspects

Witte¹,

Feller²

1996

Studies in Conservation

View full text Add to dashboard Cite

show abstract

“…This strong emission indicates a highly radiative transition and is therefore a greatly desirable characteristic for the intermediate band solar cell devices [38,46,47]. As for the PVC powder,one can observe the emission band at 466 nm of the excimer fluorescence [42], wile irradiation of the PVC/ZnTe nanocomposites with the wavelengyh of 415 nm leads to the excitation of both PVC molecules and ZnTe NPS which is followed by aluminescence with maximum at 466 nm. The two emissions, from PVC matrix and ZnTe NPs, overlap which gives anemission band with high intensity.…”

Section: Uv-visible Absorbancementioning

confidence: 98%

“…) and an optical transmittance between 90 % and 80 % in the visible range. [42][43][44][45]. As aspected the emission from the PVC polymer is dominated by excimer fluorescence [45].…”

Section: Uv-visible Absorbancementioning

confidence: 99%

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

El-Hachemi

Sebais

Sabah

et al. 2021

J Inorg Organomet Polym

View full text Add to dashboard Cite

ZnTe nanoparticles (NPs) were synthesized using hydrothermal method and then were dispersed in poly(vinyl-chloride) (PVC) to prepare hybrid PVC/ZnTe nanocomposite thin films which were deposited on glass substrates by the dip coating technique. Structural, optical and electrical properties of films were investigated by different techniques. XRD analysis revealed that synthesized ZnTe NPs have a cubic structure and a nanoscale size,while pure PVC films have a weak degree of crystallinity and exhibit a broad diffraction peak at low angles. The PVC/ZnTe nanocomposite thin films display an intense diffraction peak corresponding to the plane ( 220) which indicates a preferred orientation of ZnTe nanocystallites along crystallographic axis [220]. This texture was also showed by the atomic force microscopy micrographs.The analysis by FT-IR and Raman vibrational spectroscopies confirmed the incorporation of ZnTe NPs in the PVC matrix.The ZnTe/PVC nanocomposites thin films have an optical transparency over 80 % in the visible range and an optical gap close to 4.07 eV. Discrepancies with respect to the gap of pure PVC (red shift) and bulk ZnTe (blue shift) are due to the effect of the interaction between the ZnTe NPsand the PVC matrixand alsoto the nanometric size of the ZnTe crystallites. Photoluminescence (PL) spectra showed an enhanced blue emission at 466 nm,a green emissionat 522 nm and a strong red emission at 686 nm. Thus the incorporation of oriented ZnTe NPs induced a new optical behavior of the PVC polymer matrix.Electrical measurements indicate a decrease of electrical resistivity of PVC/ZnTe nanocompositesas ZnTe NPs concentration increases.

show abstract

“…[5] [6] ISSN: La investigación y desarrollo de los sensores químicos están dirigidos a la obtención de receptores cada vez más selectivos de iones y moléculas, sobresaliendo los sistemas fotosensibles para los sensores a tratar. Uno de los mecanismos de la síntesis de quimio-sensores es la transferencia electrónica "PET" (por sus siglas en inglés "Photoinduced electron transfer") para compuestos iónicos y no iónicos que contienen grupos fluoróforos [7]. Se encuentran reportes sobre el estudio de las propiedades fluorescentes de derivados de bis-o-aminobenzamida, Qin-chao Xu y colaboradores realizaron un estudio sobre la formación de complejos de coordinación con iones Zn +2 .…”

Section: Introductionunclassified

Estudio de propiedades fotofísicas de sensores del tipo bis-fluoroforicos y su aplicación en la detección de iones metálicos

2019

View full text Add to dashboard Cite

Las ciudades industrializadas como Tijuana desechan gran cantidad de agua con contenido de elementos metálico, resultado de los subproductos, que representan un riesgo para la salud. Una alternativa propuesta es el uso de sensores químicos basados en diferentes mecanismos. El enfoque de este proyecto es el estudio de macromoléculas bis-o-aminobenzamida, como sensores selectores de iones metálicos con aplicación en el tratamiento de aguas residuales. Se estudió una serie de cinco compuestos bis-o-aminobenzamidas como sensores químicos capaces de seleccionar y coordinar con metales disueltos en el agua, además de poder remover estos metales en presencia del coagulante natural Pectina la cual fue extraída de la penca del nopal. Para ello se preparó distintas concentraciones de los cinco compuestos, se seleccionó la más adecuada para los análisis y se puso en contacto con soluciones de distintos iones. Los compuestos y su coordinación fueron evaluados por espectroscopias de fluorescencia, UV-Visible y potencial Zeta. Además, se obtuvo micrografías SEM a la remoción obtenida. Los cinco sensores evaluados presentan distintas intensidades de fluorescencia, al estar en contacto con algunos iones metálicos se formaba una coordinación que abate la emisión de fluorescencia. Se estudiaron las propiedades fluorescentes en solución variando la concentración de ligando y se realizó el estudio de su interacción con diferentes metales de interés ambiental. Se determinó la influencia de la naturaleza de la cadena central de interconexión en las propiedades fluorescentes de la biblioteca estudiada. Estos ligandos presentan características fluorescentes interesantes, lo que les confiere un valor potencial como sensores para metales, presentando una sensibilidad para el ion Cu+2 en todos los casos.

show abstract

Photoluminescence of Synthetic Polymers

Cited by 37 publications

References 98 publications

Accelerated Aging, Photochemical and Thermal Aspects

Accelerated Aging, Photochemical and Thermal Aspects

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

Estudio de propiedades fotofísicas de sensores del tipo bis-fluoroforicos y su aplicación en la detección de iones metálicos

Contact Info

Product

Resources

About