Water soluble hyperbranched polyphenylene: "a unimolecular micelle?"
01 May 1990-Journal of the American Chemical Society (American Chemical Society)-Vol. 112, Iss: 11, pp 4592-4593
About: This article is published in Journal of the American Chemical Society.The article was published on 1990-05-01. It has received 623 citations till now. The article focuses on the topics: Micelle.
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TL;DR: I. Foldamer Research 3910 A. Backbones Utilizing Bipyridine Segments 3944 1.
Abstract: III. Foldamer Research 3910 A. Overview 3910 B. Motivation 3910 C. Methods 3910 D. General Scope 3912 IV. Peptidomimetic Foldamers 3912 A. The R-Peptide Family 3913 1. Peptoids 3913 2. N,N-Linked Oligoureas 3914 3. Oligopyrrolinones 3915 4. Oxazolidin-2-ones 3916 5. Azatides and Azapeptides 3916 B. The â-Peptide Family 3917 1. â-Peptide Foldamers 3917 2. R-Aminoxy Acids 3937 3. Sulfur-Containing â-Peptide Analogues 3937 4. Hydrazino Peptides 3938 C. The γ-Peptide Family 3938 1. γ-Peptide Foldamers 3938 2. Other Members of the γ-Peptide Family 3941 D. The δ-Peptide Family 3941 1. Alkene-Based δ-Amino Acids 3941 2. Carbopeptoids 3941 V. Single-Stranded Abiotic Foldamers 3944 A. Overview 3944 B. Backbones Utilizing Bipyridine Segments 3944 1. Pyridine−Pyrimidines 3944 2. Pyridine−Pyrimidines with Hydrazal Linkers 3945
1,922 citations
TL;DR: In this article, a couple-monomer methodology (CMM) is proposed for hyperbranched polymers, which is based on the in situ formation of ABn intermediates from specific monomer pairs.
1,896 citations
Cites background or methods from "Water soluble hyperbranched polyphe..."
...‘Hyperbranched polymer’ was first coined by Kim and Webster [46,47] in 1988 when the authors intentionally synthesized soluble hyperbranched polyphenylene....
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...SMM Polycondensation of ABn Kim/ Webster 1988 [46,47]...
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...1982 AB2 þ AB copolymerisation Kricheldorf [45] 1988– 1990 AB2 homopolymerization Kim/Webster [46,47] C....
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TL;DR: This review discusses the synthetic methodologies that are currently available for the preparation of platinum group metal complexes containing pincer ligands and especially emphasizes different applications that have been realized in materials science such as the development and engineering of sensors, switches, and catalysts.
Abstract: Since the first reports in the late 1970s on transition metal complexes contain- ing pincer-type ligands—named after the particular coordination mode of these ligands—these systems have at- tracted increasing interest owing to the unusual properties of the metal centers imparted by the pincer ligand. Typical- ly, such a ligand comprises an anionic aryl ring which is ortho,ortho-disubsti- tuted with heteroatom substituents, for example, CH2NR2 ,C H 2PR2 or CH2SR, which generally coordinate to the met- al center, and therefore support the MC s bond. This commonly results in a terdentate and meridional coordina- tion mode consisting of two metalla- cycles which share the MC bond. Detailed studies of the formation and the properties of a large variety of pincers containing platinum group metal complexes have provided direct access to both a fundamental under- standing of a variety of reactions in organometallic chemistry and to a range of new applications of these complexes. The discovery of alkane dehydrogenation catalysts, the mecha- nistic elucidation of fundamental transformations (for example, CC bond activation), the construction of the first metallodendrimers for sustain- able homogeneous catalysis, and the engineering of crystalline switches for materials processing represent only a few of the many highlights which have emanated from these numerous inves- tigations. This review discusses the synthetic methodologies that are cur- rently available for the preparation of platinum group metal complexes con- taining pincer ligands and especially emphasizes different applications that have been realized in materials science such as the development and engineer- ing of sensors, switches, and catalysts.
1,413 citations
TL;DR: The interaction of polymers with their environment depends largely on the functional groups they carry and the placement of functional groups at polymer chain ends or in well-defined segments can determine the ultimate properties.
Abstract: The interaction of polymers with their environment depends largely on the functional groups they carry. Interfaces between different polymers or between polymers and other surfaces can be strengthened through the design of molecular interactions such as hydrogen bonding and through the control of polymer architecture. The placement of functional groups at polymer chain ends or in well-defined segments can determine the ultimate properties. Three-dimensional synthetic polymers such as dendrimers can be fashioned to encapsulate reactive sites or provide highly controlled surfaces and interfaces.
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