نتایج جستجو برای: dendrimers

تعداد نتایج: 3050  

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2012
Satoshi Nakazato Tsutomu Takizawa Tatsuo Arai

Naphthalene-terminated stilbene dendrimers, the largest stilbene dendrimers to date, underwent photoisomerization via highly efficient energy transfer from the dendron group to the core stilbene. It was also demonstrated that the energy transfer efficiency in these dendrimers may be controlled by light, utilizing trans-cis isomerization as the key photoreaction.

Journal: :Chemical communications 2014
Pin Shao Ningyang Jia Shaojuan Zhang Mingfeng Bai

We report the synthesis and photophysical properties of three biperylene-based dendrimers, which show red fluorescence in water. A fluorescence microscopy study demonstrated uptake of biperylene-based dendrimers in living cells. Our results indicate that these biperylene-based dendrimers are promising candidates in fluorescence imaging applications with the potential as therapeutic carriers.

Journal: :Annals of the New York Academy of Sciences 2006
Brenda S Cho Karen J Roelofs Istvan J Majoros James R Baker James C Stanley Peter K Henke Gilbert R Upchurch

In this study, the distribution of labeled dendrimers in native and aneurysmal rat aortic tissue was examined. Adult male rats underwent infrarenal aorta perfusion with generation 5 (G5) acetylated Alexa Fluor 488-conjugated dendrimers for varying lengths of time. In a second set of experiments, rats underwent aortic elastase perfusion followed by aortic dendrimer perfusion 7 days later. Aortic...

The purpose of the matching interdiction problem in a weighted graph is to find two vertices such that the weight of the maximum matching in the graph without these vertices is minimized. An approximate solution for this problem has been presented. In this paper, we consider dendrimers as graphs such that the weights of edges are the bond lengths. We obtain the maximum matching in some types of...

Journal: :Linear Algebra and its Applications 2023

We investigate the spectral properties of balanced trees and dendrimers, with a view toward unifying improving existing results. Here we find semi-factorized formula for their characteristic polynomials. Afterwards, determine spectra via aforementioned factors. In end, analyze behavior energy dendrimers compute lower upper bound approximations it.

2000
JINFENG WANG XINRU JIA HONG ZHONG HUIZHONG WU YOUYONG LI XIAOJIE XU MINGQIAN LI YEN WEI

Poly(amidoamine)(PAMAM) dendrimers with a cinnamoyl shell were prepared by reacting full generation PAMAM dendrimers (G53.0) with 2-chloroethanol and cinnamoyl chloride, which resulted in densely packed polymerizable unsaturated groups on the periphery. The cinnamoyl shell of the dendrimers dimerized when irradiated under a UV light by using 5-nitroacenaphthylene as an initiator in dilute dimet...

2008
Malgorzata A. Kaczorowska Helen J. Cooper

Here, we investigate the effect of the structure (generation) and nature of the surface groups of different polyamidoamine (PAMAM) dendrimers on electron-mediated dissociation, either electron capture dissociation (ECD) or electron detachment dissociation (EDD), and compare the fragmentation with that observed in collision-induced dissociation (CID). ECD and EDD of the PAMAM dendrimers resulted...

Journal: :iranian journal of mathematical chemistry 2012
m. ghorbani m. songhori

the omega polynomial(x) was recently proposed by diudea, based on the length of stripsin given graph g. the sadhana polynomial has been defined to evaluate the sadhana index ofa molecular graph. the pi polynomial is another molecular descriptor. in this paper wecompute these three polynomials for some infinite classes of nanostructures.

2009
Tetsuo Koyama Ken Hatano Koji Matsuoka Yasuaki Esumi

Preparation of photo-responsive carbosilane dendrimers bearing 4-phenylazobenzonitrile units on their molecular surface has been accomplished, and their both photo and thermal behaviors have also been characterized. These functional dendrimers suggest that the apparent molecular sizes of the cis-isomers are smaller than those of the corresponding trans-isomers, since the molecular diameter of t...

Journal: :Organic letters 2006
Arpornrat Nantalaksakul Raghunath Reddy Dasari Tai-Sang Ahn Rabih Al-Kaysi Christopher J Bardeen S Thayumanavan

[reaction: see text] We have designed and synthesized difunctionalized dendrimers containing two donors in the periphery and an acceptor at the core to serve as scaffolds for comparison with linear analogues to investigate the advantage of dendritic scaffolds for energy and charge transfer. Comparison of these dendrimers with the fully decorated dendrimers provides information on the advantage ...

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