Optical Properties of Lanthanide Metal Ion Polymer Complexes

1992 ◽  
Vol 277 ◽  
Author(s):  
Yoshi Okamoto ◽  
Junji Kido
Keyword(s):  
Metal Ion ◽  
Organic Dyes ◽  
Red Light ◽  
Laser Action ◽  
Electronic Energy ◽  
Luminescence Spectra ◽  
Fluorescent Properties ◽  
Polymer Complexes ◽  
Electronic Energy Transfer ◽  
Lanthanide Metal

ABSTRACTThe fluorescent characteristics of lanthanide chelates are of considerable interest in connection with electronic energy transfer processes and with their use in laser systems. We have synthesized various chelating groups, such as diketone and bypyridyl containing polymers and prepared their Tb3+ and Eu3+ complexes. Their fluorescent properties in connection with a possible laser action were investigated.Electroluminscence (EL) in organic compounds has been investigated from fundamental as well as practical point of views. Various organic dyes were utilized as emitter materials in EL devices. In these examples, owing to the broad nature of the luminescence spectra of organic dyes, the luminescent colors are dull. We have utilized lanthanide metal ion complexes as a luminescent emitter.Tb and Eu ion complexes emitted sharp green and red light, respectively. The configuration of the EL cell and experimental results are described.

Synthesis and Emission Properties of meso-Substituted Porphyrins

2014 ◽  
Vol 71 (1) ◽  
Author(s):  
Tan Ke Xin ◽  
Hendrik O. Lintang ◽  
Abdul Rahman Tamuri ◽  
Salasiah Endud ◽  
Mohd Bakri Bakar
Keyword(s):  
Electron Transfer ◽  
Organic Dyes ◽  
Red Light ◽  
Emission Spectra ◽  
Model Systems ◽  
Fluorescent Properties ◽  
Light Emitting ◽  
Absorption Energy ◽  
Energy And Electron Transfer ◽  
Artificial Photosynthetic

Discovering of various organic dyes including porphyrins have attracted considerable attention to mimic the energy and electron transfer process for the artificial photosynthetic model systems which can be applied in developing optoelectronic devices. The accessibility on tailoring porphyrin properties makes them a good candidate to, be developed as the red light emitting materials for these applications. Thus, symmetrical and unsymmetrical molecular models of porphyrins with appended fluorenyl components and extended π electrons conjugated system were synthesized towards increasing the efficiency of energy and electron transfer. In the photophysical studies, the emission spectra proposed the evidence of energy transfer of appended fluorenyl arms into the porphyrin macrocyclic whereas the extension of conjugating system in porphyrins exhibits lower absorption energy and intensified the red fluorescent properties.

scholarly journals Detection of metal ions in biological systems: A review

2020 ◽  
Vol 39 (1) ◽  
pp. 231-246 ◽  
Author(s):  
Xian Zheng ◽  
Wenyu Cheng ◽  
Chendong Ji ◽  
Jin Zhang ◽  
Meizhen Yin
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Metabolic Regulation ◽  
Organic Dyes ◽  
Biological Systems ◽  
High Sensitivity ◽  
Transportation Energy ◽  
Material Transportation ◽  
High Fluorescence ◽  
Metal Ion Detection

Abstract Metal ions are widely present in biological systems and participate in many critical biochemical processes such as material transportation, energy conversion, information transmission and metabolic regulation, making them indispensable substance in our body. They can cause health problems when deficiency or excess occurs. To understand various metabolic processes and facilitate diseases diagnosis, it is very important to measure the content and monitor the distribution of metal ions in individual cells, tissues and whole organisms. Among the various methods for metal ion detection, fluorescent sensors with organic dyes have attracted tremendous attention due to many advantages such as high fluorescence quantum yield, facile modification approaches and biocompatibility in addition to operation ease, high sensitivity, fast detection speed, and real-time detection. This review summarizes the recent progress on the detection and imaging of the metal ions in biological systems including Na+, K+, Ca2+, Mg2+, Fe2+/Fe3+, Zn2+, and Cu2+ provides an opinion on remaining challenges to be addressed in this field.

scholarly journals Damming an Electronic Energy Reservoir: Ion-regulated Electronic Energy Shuttling in a [2]Rotaxane

2021 ◽  
Author(s):  
Shilin Yu ◽  
Gediminas Jonusauskas ◽  
Jean-Luc Pozzo ◽  
Stephen Goldup ◽  
Vicente Martí Centelles ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Electronic Energy ◽  
Electronic Energy Transfer

We demonstrate the first example of bidirectional reversible electronic energy transfer (REET) between the mechanically bonded components of a rotaxane. Our prototypical system was designed such that photoexcitation of a...

Spectroscopic confirmation of reversible electronic energy transfer in methylglyoxal

1975 ◽  
Vol 63 (1) ◽  
pp. 593-594 ◽  
Author(s):  
R. L. Opila ◽  
R. A. Coveleskie ◽  
James T. Yardley
Keyword(s):  
Energy Transfer ◽  
Electronic Energy ◽  
Electronic Energy Transfer

Vibrational relaxation and electronic energy transfer ofN2aggregates in solid Xe matrices

1985 ◽  
Vol 31 (8) ◽  
pp. 4854-4865 ◽  
Author(s):  
H. Kühle ◽  
J. Bahrdt ◽  
R. Fröhling ◽  
N. Schwentner ◽  
H. Wilcke
Keyword(s):  
Energy Transfer ◽  
Vibrational Relaxation ◽  
Electronic Energy ◽  
Electronic Energy Transfer

Electronic energy transfer in beam pumped gas mixtures

1974 ◽  
Vol 10 (9) ◽  
pp. 752-752
Author(s):  
R. Hill ◽  
D. Eckstrom ◽  
R. Gutcheck ◽  
D. Huestis ◽  
D. Lorents ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Gas Mixtures ◽  
Electronic Energy ◽  
Electronic Energy Transfer
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