Abstract This review draws a rather comprehensive picture of how Suzuki polycondensation was discovered in 1989 and it subsequently developed into the most powerful polymerization method for polyarylenes during last 20 years. It combines insights synthetic issues with classes polymers prepared touches upon aspects this method's technological importance. Because significant part developmental work carried out industry, present makes reference to an unusually large number patents. magnified image

Sheets and rational synthesis are not like fire water! Hexafunctional terpyridine monomers can be laterally connected by metal salts to result in a mechanically stable, sheetlike entity that transferred from the air/water interface solid substrate (see folded, ca. 1.4 nm thin film) spanned over micrometer-sized holes. This is considered an important step on way 2D polymers. Detailed facts of importance specialist readers published as "Supporting Information". Such documents peer-reviewed,...

Abstract The newly developed oligophenylenevinylene (OPV)‐based fluorescent (FL) chiral chemosensor (OPV‐Me) for the representative enantiomeric guest, 1,2‐cyclohexanedicarboxylic acid (1,2‐CHDA: RR ‐ and SS ‐form) showed high discrimination ability, resulting in different aggregation modes of OPV‐Me self‐assembly: ‐CHDA directed fibrous supramolecular aggregate, whereas finite aggregate. consequent FL intensity toward was up to 30 times larger than that ‐CHDA. Accordingly, highly...

Hexafunktionelle Terpyridinmonomere können lateral durch Metallsalze verbunden werden, was zu einem mechanisch stabilen, blattähnlichen Gebilde führt, das von der Luft-Wasser-Grenzfläche auf einen festen Träger überführt (siehe den gefalteten, ca. 1.4 nm dünnen Film) und über μm-große Löcher gespannt werden kann. Dieser Befund ist ein wichtiger Schritt dem Weg hin zweidimensionalen Polymeren. Detailed facts of importance to specialist readers are published as "Supporting Information". Such...

The in-depth structural analysis of spherulites artificial cellulose, formed by the enzymatic polymerization cellobiosyl fluoride, is reported. Both positive- and negative-type were observed polarization optical microscopy. Scanning electron microscopy revealed that negative have a three-dimensional round shape, where platelike single crystals cellulose originate radially from center. Transmission confirmed chains orient vertically in crystals, explaining observation Cellulose can be easily...

Synthesis of a poly(m-phenylene) by Suzuki polycondensation (SPC) using an AB-type m-phenylene monomer is reported (A and B refer to bromo boron functional groups, respectively). Despite the attempted high molecular weight products, SPC under conventional conditions Pd[P(p-Tol)3]3 as catalyst gave rise oligomeric products only. They comprise cycles several series open-chain poly(m-phenylene)s with various end group patterns. These patterns were caused side reactions such ligand scrambling....

Oligophenylenevinylene (OPV)-based fluorescent (FL) chemosensors exhibiting linear FL responses toward polyanions were designed. Their application to sensing of glycosaminoglycans (heparin: HEP, chondroitin 4-sulfate: ChS, and hyaluronic acid: HA) revealed that the charge density encoded as unit structure directs mode OPV self-assembly: H-type aggregate for HEP with 16-times increase J-type HA 93-times increase, thus unexpectedly achieving preferential selectivity in contrast conventional...

A crystalline product of artificial chitin by chitinase-catalyzed polymerization a chitobiose oxazoline derivative was investigated using optical microscopy in combination with TEM and SEM techniques. Platelike single crystals α-chitin were first formed. The gradually shaped into ribbons the rapid growth along axis thickness being ca. 10 nm. then aggregated to form bundlelike or dendritic assemblies as ribbon concentration solution increased. They grew spherulites splaying branching, which...

Two straight monomers were subjected to an AA/BB-type Suzuki polycondensation with a hairpin-shaped 1,8-anthrylene monomer as the counterpart leading novel polyarylene which should have preferred conformation of folded chain. The molar masses determined by gel permeation chromatography and dynamic light scattering found be Mw = 14,000 Mn 7,000. MALDI-TOF MS analysis fraction provides fingerprint step-growth nature this polymerization.

A new glycodendrimer type has been introduced that is designed on the basis of shape-persistent polyphenylene dendrimers. The sugar installation occurs not only dendrimer surface but also within hydrophobic internal scaffold. synthesis accomplished via both convergent and divergent routes by employing Schmidt glycosylation Diels−Alder reaction. This found to exhibit water-solubility, while conserving hydrophobicity interior environment despite incorporation sugars.

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTSynthesis of Polyphenylenes from a Soluble Precursor: The "Shaving" ApproachSamuel Jakob†, Aitor Moreno‡, Xiangyang Zhang‡, Louis Bertschi‡, Paul Smith§, A. Dieter Schlüter†, and Junji Sakamoto*†View Author Information† Laboratory Polymer Chemistry, Institute Polymers, Department Materials, ETH Zurich, Wolfgang-Pauli-Strasse 10, HCI G523, CH-8093 Switzerland‡ Chemistry Applied Bioscience, Switzerland§...

This short review article provides insight into the impact organic chemistry can have on state-of-the-art materials creation. Three cases were selected from authors' laboratory, first being 'Suzuki polycondensation', a powerful method with which innovative was successfully transferred to polymer synthesis and meanwhile has even found technical scale application. The second describes decoration of linear polymers dense layer regular branch work. Though seemingly rather esoteric enterprise,...

Abstract In our bodies, a slight pH change causes remarkable activation or serious damage in the biological processes and continuously keeps homeostasis. Detection of such has been constant demand searching for unusual events. this paper, we demonstrate novel sensory system that achieved through combination charge neutralization by with aggregation‐induced emission (AIE). We selected cyano‐functionalized oligo(phenylene‐vinylene) (cyanoOPV) backbone AIE introduced ammonium‐tethered boronic...

A novel saccharide sensing system has been established with an aggregation-induced emission (AIE)-cored probe by utilizing the dynamic covalent bond formation between diol and boronic acid. Interestingly, this can selectively sense d-glucose, fluorescence spectrum shows a ratiometric change arising from d-glucose-induced stepwise morphological growth.

Abstract Oligophenylenevinylene (OPV)‐based fluorescent (FL) chemosensors exhibiting linear FL responses toward polyanions were designed. Their application to sensing of glycosaminoglycans (heparin: HEP, chondroitin 4‐sulfate: ChS, and hyaluronic acid: HA) revealed that the charge density encoded as unit structure directs mode OPV self‐assembly: H‐type aggregate for HEP with 16‐times increase J‐type HA 93‐times increase, thus unexpectedly achieving preferential selectivity in contrast...

Abstract The newly developed oligophenylenevinylene (OPV)‐based fluorescent (FL) chiral chemosensor (OPV‐Me) for the representative enantiomeric guest, 1,2‐cyclohexanedicarboxylic acid (1,2‐CHDA: RR ‐ and SS ‐form) showed high discrimination ability, resulting in different aggregation modes of OPV‐Me self‐assembly: ‐CHDA directed fibrous supramolecular aggregate, whereas finite aggregate. consequent FL intensity toward was up to 30 times larger than that ‐CHDA. Accordingly, highly...

We report the properties of a shape-persistent tetra-terpyridine ligand whose coordination to transition metal ions guides its three-dimensional self-assembly in two steps: at first, nanoscale objects form, which with time, self-assemble into micrometer structures. This work highlights potential for control molecular molecules on nanoscale, and successive formed supramolecular nanosystems yield mesoscopic objects.

Abstract Regiospecifically 3-O- and/or 3′-O-methylated derivatives of a chitobiose oxazoline have been synthesized as new substrate monomers and subjected to chitinase catalysis, leading the first synthesis 3-O-methylated chitin oligomers via enzymatic oligomerization.

Abstract A set of m ‐terphenylenes having a readily functionalizable hydroxy group as well either symmetric AA‐type or unsymmetric AB‐type halide termini have been prepared on several‐gram scale. The synthesis was carried out the basis Suzuki–Miyaura cross‐coupling in combination with TMS masking strategy. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

Abstract The control over supramolecular interactions and obtaining information beyond the molecular scale is an extended challenge. intriguing self‐assembly of a perylene‐3,4,9,10‐tetracarboxylic acid diimide (PDI)‐based novel bolaamphiphilic probe experienced within artificial environment that restrained by using crystallization recognition. bolaamphiphile with hydrophilic [18]‐azacrown ether ring produced nanoaggregates due to differing solubilities in organic aqueous media. A structural...