Molecular Recognition in Structured Matrixes: Control of Guest Localization in Block Copolymer Films
摘要:
We demonstrate the use of molecular recognition to control the spatial distribution of guest molecules within block copolymer films. Block copolymers bearing recognition units were combined with complementary and noncomplementary molecules, and the extent of segregation of these molecules into the different domain types within microphase-separated thin films was quantitatively analyzed using dynamic secondary ion mass spectrometry (SIMS). Complementarity between the guest molecules and the polymer functionalities proved to be a key factor and an efficient tool for directing the segregation preference of the molecules to the different domain types. The effect of segregation preference on the glass transition temperature was studied using differential scanning calorimetry (DSC), and the results corroborate the SIMS findings. In a complementary study, guests with tunable sizes (via dendron substituents) were used to control block copolymer morphology. Morphological characterization using transmission electron microscopy (TEM) and X-ray diffraction reveal that selectivity differences can be directly translated into the ability to obtain different morphologies from recognition unit-functionalized block copolymer scaffolds.
Molecular Recognition in Structured Matrixes: Control of Guest Localization in Block Copolymer Films
摘要:
We demonstrate the use of molecular recognition to control the spatial distribution of guest molecules within block copolymer films. Block copolymers bearing recognition units were combined with complementary and noncomplementary molecules, and the extent of segregation of these molecules into the different domain types within microphase-separated thin films was quantitatively analyzed using dynamic secondary ion mass spectrometry (SIMS). Complementarity between the guest molecules and the polymer functionalities proved to be a key factor and an efficient tool for directing the segregation preference of the molecules to the different domain types. The effect of segregation preference on the glass transition temperature was studied using differential scanning calorimetry (DSC), and the results corroborate the SIMS findings. In a complementary study, guests with tunable sizes (via dendron substituents) were used to control block copolymer morphology. Morphological characterization using transmission electron microscopy (TEM) and X-ray diffraction reveal that selectivity differences can be directly translated into the ability to obtain different morphologies from recognition unit-functionalized block copolymer scaffolds.
Aryl pyrimidyl compounds, pharmaceutical compositions comprising them, their use as antimicrobial agents
申请人:INSTITUT PASTEUR
公开号:EP1655288A1
公开(公告)日:2006-05-10
Molecule responding to formula (I):
and its use for the preparation of a medicament for the prevention and/or treatment of a pathology caused by a mycobacteria
分子对化学式(I)的响应:及其用于制备用于预防和/或治疗由分枝杆菌引起的病理的药物。
Aryl, Pyrimidyl Compounds, Pharmaceutical Compositions Comprising them, Their Use as Antimicrobial Agents
申请人:Munier-Lehmann Helene
公开号:US20080096907A1
公开(公告)日:2008-04-24
Substituted aryl pyrimidyl compounds responding to formula (I) and their use for the preparation of a medicament for the prevention and/or treatment of a pathology caused by a mycobacteria.
3-Hydroxypyrimidine-2,4-diones as an Inhibitor Scaffold of HIV Integrase
作者:Jing Tang、Kasthuraiah Maddali、Mathieu Metifiot、Yuk Y. Sham、Robert Vince、Yves Pommier、Zhengqiang Wang
DOI:10.1021/jm1014378
日期:2011.4.14
Integrase (IN) represents a clinically validated target for the development of antivirals against human immunodeficiency virus (HIV). Inhibitors with a novel structure core are essential for combating resistance associated with known IN inhibitors (IN Is). We have previously disclosed a novel dual inhibitor scaffold of HIV IN and reverse transcriptase (RT). Here we report the complete structure activity relationship (SAR), molecular modeling, and resistance profile of this inhibitor type on IN inhibition. These studies support an antiviral mechanism of dual inhibition against both IN and RT and validate 3-hydroxypyrimidine-2,4-diones as an IN inhibitor scaffold.
Molecular Recognition in Structured Matrixes: Control of Guest Localization in Block Copolymer Films
作者:Roy Shenhar、Hao Xu、Benjamin L. Frankamp、Thomas E. Mates、Amitav Sanyal、Oktay Uzun、Vincent M. Rotello
DOI:10.1021/ja055490f
日期:2005.11.23
We demonstrate the use of molecular recognition to control the spatial distribution of guest molecules within block copolymer films. Block copolymers bearing recognition units were combined with complementary and noncomplementary molecules, and the extent of segregation of these molecules into the different domain types within microphase-separated thin films was quantitatively analyzed using dynamic secondary ion mass spectrometry (SIMS). Complementarity between the guest molecules and the polymer functionalities proved to be a key factor and an efficient tool for directing the segregation preference of the molecules to the different domain types. The effect of segregation preference on the glass transition temperature was studied using differential scanning calorimetry (DSC), and the results corroborate the SIMS findings. In a complementary study, guests with tunable sizes (via dendron substituents) were used to control block copolymer morphology. Morphological characterization using transmission electron microscopy (TEM) and X-ray diffraction reveal that selectivity differences can be directly translated into the ability to obtain different morphologies from recognition unit-functionalized block copolymer scaffolds.