SIMS studies of polymeric tertiary structures in monolayers: Polysiloxane helical coil structures

Rey-Santos R; Piwowar A; Alvarado LZ; Gardella JA

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SIMS studies of polymeric tertiary structures in monolayers: Polysiloxane helical coil structures

机译：SIMS研究单层聚合物三级结构：聚硅氧烷螺旋线圈结构

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A static SIMS study was performed using poly(dimethyl siloxane) (PDMS) as a model system to investigate the effects of tertiary structure on the ion formation mechanism and ion formation probability of fragments in the high mass region (> 1000 Da). PDMS produced from anionic polymerization with a narrow polydispersity, can form well-ordered helically coiled monolayers using Langmuir-Blodgett methods at the air water interface, either in a hairpin configuration, if the endgroups are functional or as flat helically coiled chains. Reflection absorption Fourier transform infrared (RA-FTIR) spectroscopic analysis shows the changes in bonding between flat helically coiled PDMS and cast films from dilute solvents, which produces a random coil configuration. Differences between the model systems in infrared spectrum show evidence of changes in structure, producing variation in band formation. Also observed are changes in the band shape and relative peak area between the model systems. These polymeric changes translate into differences in the relative intensities of fragments formed in the repeating pattern of clusters in the high mass ToF-SIMS spectra of the ordered versus the random cast films. Both statistical chain break analysis and molecular mechanics simulations of structure are used to support the analysis. (c) 2006 Elsevier B.V. All rights reserved.

机译：使用聚二甲基硅氧烷（PDMS）作为模型系统进行了静态SIMS研究，以研究三级结构对离子在大质量区域（> 1000 Da）中的离子形成机理和离子形成概率的影响。由阴离子聚合产生的具有窄多分散性的PDMS可以使用Langmuir-Blodgett方法在空气-水界面处以发夹结构（如果末端基团起作用）或平坦的螺旋状盘绕链形成排列整齐的螺旋状盘绕单层。反射吸收傅里叶变换红外（RA-FTIR）光谱分析表明，扁平螺旋盘绕的PDMS与稀溶剂流延薄膜之间的键合发生了变化，从而产生了无规盘绕结构。红外光谱中模型系统之间的差异显示出结构变化的证据，从而导致谱带形成发生变化。还观察到模型系统之间的谱带形状和相对峰面积的变化。这些聚合变化转化为在有序流延膜与无规流延膜的高质量ToF-SIMS光谱中以团簇重复模式形成的片段的相对强度差异。统计链断裂分析和结构的分子力学模拟均用于支持该分析。（c）2006 Elsevier B.V.保留所有权利。

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来源
《Applied Surface Science》 |2006年第19期|p. 6605-6608|共4页
作者
Rey-Santos R; Piwowar A; Alvarado LZ; Gardella JA;
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作者单位

SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA;

Univ Puerto Rico, Cayey, PR USA;

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原文格式 PDF
正文语种 eng
中图分类应用物理学;
关键词
ToF-SIMS; PDMS; polymeric tertiary structure; POLY(DIMETHYLSILOXANE);

机译：ToF-SIMS;PDMS;聚合物三级结构;聚二甲基硅氧烷;

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1. Integrin alpha 2 beta 1-independent activation of platelets by simple collagen-like peptides: collagen tertiary (triple-helical) and quaternary (polymeric) structures are sufficient alone for alpha 2 beta 1-independent platelet reactivity. [J] . Morton LF, Hargreaves PG, Farndale RW, The Biochemical Journal . 1995,第Pta2期

机译：通过简单的类胶原蛋白肽对血小板的整合素α2β1的活化：胶原三级（三螺旋）和季级（聚合）结构足以满足α2β1的非血小板反应性。
2. INTEGRIN ALPHA-2-BETA-1-INDEPENDENT ACTIVATION OF PLATELETS BY SIMPLE COLLAGEN-LIKE PEPTIDES - COLLAGEN TERTIARY (TRIPLE-HELICAL) AND QUATERNARY (POLYMERIC) STRUCTURES ARE SUFFICIENT ALONE FOR ALPHA-2-BETA-1-INDEPENDENT PLATELET REACTIVITY [J] . Morton LF, Hargreaves PG, Farndale RW, The Biochemical Journal . 1995,第Pta2期

机译：简单胶原蛋白肽对血小板的整合ALPHA-2-BETA-1活化-胶原蛋白三级（三螺旋）和四级（聚合物）结构足以满足ALPHA-2-BETA-1的血小板反应性
3. Integrin α2β1-independent activation of platelets by simple collagen-like peptides: collagen tertiary (triple-helical) and quaternary (polymeric) structures are sufficient alone for α2β1-independent platelet reactivity [J] . L F Morton, M J Barnes, P G Hargreaves, The biochemical journal . 1995,第2期

机译：通过简单的类胶原蛋白肽对血小板的整合素α2β1的活化作用：胶原三级（三螺旋）和四级（聚合）结构足以满足不依赖α2β1的血小板反应性
4. Scanning force microscopic study of aggregation structure of polysiloxane monolayers [C] . Atsushi Takahara, Ken Kojio, Shouren Ge, International microsymposium on polymer physics . 1997

机译：聚硅氧烷单分子层聚集结构的扫描力显微镜研究
5. Studies of interfacial behavior, surface morphology and tertiary structures of polysiloxane blends and copolymers at the air/water interface and their use as model systems to study ion formation mechanisms in secondary ion mass spectrometry. [D] . Moon, Hye Kyoung. 2010

机译：研究聚硅氧烷共混物和共聚物在空气/水界面处的界面行为，表面形态和三级结构，并将其用作模型系统研究二次离子质谱中的离子形成机理。
6. Integrin alpha 2 beta 1-independent activation of platelets by simple collagen-like peptides: collagen tertiary (triple-helical) and quaternary (polymeric) structures are sufficient alone for alpha 2 beta 1-independent platelet reactivity. [O] . L F Morton, P G Hargreaves, R W Farndale, 1995

机译：通过简单的类胶原蛋白肽对血小板的整合素α2β1的活化：胶原三级（三螺旋）和季（聚合）结构足以满足α2β1的非血小板反应性。
7. Integrin α2β1-independent activation of platelets by simple collagen-like peptides: collagen tertiary (triple-helical) and quaternary (polymeric) structures are sufficient alone for α2β1-independent platelet reactivity [O] . L F Morton, P G Hargreaves, R W Farndale, 1995

机译：通过简单的胶原蛋白样肽整合α2β1独立激活血小板：胶原叔术（三螺旋）和季（聚合物）结构单独用于α2β1独立的血小板反应性
8. Correlations between Polymer Structure and Glass Transition Temperature. I. Polysiloxanes Polyarylenesiloxanes and Polyxylylenesiloxanes [R] . Ehlers, G. F. L., Fisch, K. R. 1975

机译：聚合物结构与玻璃化转变温度的相关性。 I.聚硅氧烷聚芳烃硅氧烷和聚氧乙烯硅氧烷

SIMS studies of polymeric tertiary structures in monolayers: Polysiloxane helical coil structures

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