Excess Polarizability Reveals Exciton Localization/Delocalization Controlled by Linking Positions on Porphyrin Rings in Butadiyne-Bridged Porphyrin Dimers

2010 ◽  
Vol 114 (10) ◽  
pp. 3384-3390 ◽  
Author(s):  
Chunxing She ◽  
Shanmugam Easwaramoorthi ◽  
Pyosang Kim ◽  
Satoru Hiroto ◽  
Ichiro Hisaki ◽  
...  
Keyword(s):  
Exciton Localization ◽  
Porphyrin Dimers ◽  
Porphyrin Rings

EXCITON LOCALIZATION BY COMPOSITIONAL FLUCTUATIONS IN II-VI SEMICONDUCTOR SOLID SOLUTIONS

1985 ◽  
Vol 46 (C7) ◽  
pp. C7-173-C7-177 ◽  
Author(s):  
S. Permogorov ◽  
A. Reznitsky ◽  
S. Verbin ◽  
A. Naumov ◽  
W. von der Osten ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Exciton Localization

Biology of Heme: Drug Interactions and Adverse Drug Reactions with CYP450

2019 ◽  
Vol 18 (23) ◽  
pp. 2042-2055 ◽  
Author(s):  
Neeraj Kumar ◽  
Heerak Chugh ◽  
Damini Sood ◽  
Snigdha Singh ◽  
Aarushi Singh ◽  
...  
Keyword(s):  
Cytochrome P450 ◽  
Drug Metabolism ◽  
Drug Interactions ◽  
Adverse Drug Reactions ◽  
Genetic Defects ◽  
Drug Reactions ◽  
Detailed Structure ◽  
Synthesis And Degradation ◽  
Porphyrin Rings

Heme is central to functions of many biologically important enzymes (hemoproteins). It is an assembly of four porphyrin rings joined through methylene bridges with a central Fe (II). Heme is present in all cells, and its synthesis and degradation balance its amount in the cell. The deregulations of heme networks and incorporation in hemoproteins lead to pathogenic state. This article addresses the detailed structure, biosynthesis, degradation, and transportation associated afflictions to heme. The article is followed by its roles in various diseased conditions where it is produced mainly as the cause of increased hemolysis. It manifests the symptoms in diseases as it is a pro-oxidant, pro-inflammatory and pro-hemolytic agent. We have also discussed the genetic defects that tampered with the biosynthesis, degradation, and transportation of heme. In addition, a brief about the largest hemoprotein group of enzymes- Cytochrome P450 (CYP450) has been discussed with its roles in drug metabolism.

scholarly journals Adventures in molecular recognition. The ins and outs of templating

2000 ◽  
Vol 72 (12) ◽  
pp. 2265-2274 ◽  
Author(s):  
Jeremy K. M. Sanders
Keyword(s):  
Molecular Recognition ◽  
Combinatorial Chemistry ◽  
Biological Systems ◽  
Design Approach ◽  
Supramolecular Systems ◽  
Disulfide Exchange ◽  
Dynamic Combinatorial Chemistry ◽  
Evolutionary Features ◽  
Selection Approach ◽  
Porphyrin Dimers

Two different approaches are described for the creation of supramolecular systems potentially capable of recognition and catalysis. Using the design approach, we have been able to accelerate and influence two different Diels­Alder reactions within the cavities of porphyrin dimers and trimers; this is templating from the outside inwards. The selection approach is a synthetic chemical attempt to capture some of the key evolutionary features of biological systems: dynamic combinatorial chemistry is used to create equilibrating mixtures of potential receptors, and then a template is used to select and amplify the desired system. Five potential reactions for such dynamic chemistry are discussed: base-catalyzed transesterification, hydrazone exchange, disulfide exchange, alkene metathesis, and Pd-catalyzed allyl exchange, and preliminary templating results (inside outwards) are presented.

Microroughness and exciton localization in (Al,Ga)As/GaAs quantum wells

1997 ◽  
Vol 55 (8) ◽  
pp. 5253-5258 ◽  
Author(s):  
R. Grousson ◽  
V. Voliotis ◽  
N. Grandjean ◽  
J. Massies ◽  
M. Leroux ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Exciton Localization

scholarly journals Ubiquity of Exciton Localization in Cryogenic Carbon Nanotubes

Nano Letters ◽  
2016 ◽  
Vol 16 (5) ◽  
pp. 2958-2962 ◽  
Author(s):  
Matthias S. Hofmann ◽  
Jonathan Noé ◽  
Alexander Kneer ◽  
Jared J. Crochet ◽  
Alexander Högele
Keyword(s):  
Carbon Nanotubes ◽  
Exciton Localization

ChemInform Abstract: Regioselective Syntheses of Ether-Linked Porphyrin Dimers and Trimers Related to Photofrin-II.

ChemInform ◽  
2010 ◽  
Vol 23 (12) ◽  
pp. no-no
Author(s):  
R. K. PANDEY ◽  
F.-Y. SHIAU ◽  
T. J. DOUGHERTY ◽  
K. M. SMITH
Keyword(s):  
Photofrin Ii ◽  
Porphyrin Dimers
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