Toward Photopatternable Thin Film Optical Sensors Utilizing Reactive Polyphenylacetylenes

Pauly, Anja C.; Théato, Patrick

doi:10.1002/marc.201200764

Cited by 23 publications

(16 citation statements)

References 38 publications

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“…More importantly, the polymer provides a versatile platform to create functional pore surfaces: the pentafluorophenyl ester enables amine coupling via active ester chemistry as well as ester hydrolysis for flexible follow‐up functionalization and adaptation of these layers. [ 42 ] Upon NPFPE grafting we observe an increase in Young's contact angle from 20°–30° up to 110°–130°, which is accompanied by a transition from Wenzel to Cassie–Baxter wetting state, demonstrated by the emergence of grating coloration (Figure 2d). These macroscopic changes in properties evidence the successful hydrophobization that is consequently used to enable further local functionalization by a wetting‐induced discrimination between the different gold elements.…”

Section: Resultssupporting

confidence: 92%

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

Ochs

Mohammadi²,

Vogel³

et al. 2020

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Mimicking such functional control in synthetic nanopores requires precise control of structure and local placement of surface functionality. Such precisely prepared materials with nanoscale control on structure and functionalization would allow, for example, new perspectives in sensing. [1] Further strategies mimicking the functionality of biological channels include dynamic curvature nanochannel-based membranes to regulate ionic transport [2] or flexible elastomer-based microchannels for microfluidic devices. [3] Already today nanoscopically structured materials play a crucial role in applications such as sensors or lab on chip devices, [4] separation, [4d] catalysis, [5] and for the developing of new materials, for example for applications in tissue engineering [6] or for the control of surface wettability. [7] Traditionally, nanostructures are fabricated using top-down approaches like photolithography, ink-jet printing or electrospinning. Alternatively, bottom-up methods, which are based on the self-assembly of molecules or larger building blocks, can yield defined structures with high resolution. [8] Periodic, nanostructured materials are for example accessible through the self-assembly of colloidal building blocks, which can yield macroscopic areas of wellordered colloidal crystals. [9] Such colloidal crystals can be further used as templates to generate inorganic, interconnected nanopore arrays by backfilling with a sol-gel precursor and subsequent removal of the templating particles. [9a,10] In two dimensions, the resulting porous materials are known as inverse colloidal monolayers and their wettability can be adjusted by pore opening angle and surface functionalization. [7e,11] Such structures are ideal model pores due to their uniformity, adjustable pore size and ordered structure.A key step toward multifunctional nanopores with nanolocal control, is the ability to precisely position different functionalities into individual pores. [1a] Therefore, it is necessary to develop strategies for a nanoscale control in manufacturing and functionalization of porous materials. This enables nanopore design with multiple functional and responsive units, individually and precisely placed into each nanopore. [1b] To date, functionalization of porous silica materials is mainly based on postsynthetic functionalization strategies like grafting of silanes from gas or liquid phase or cocondensation of functional building blocks. [12] These approaches generally result in a homogenous functionalization without In the context of sensing and transport control, nanopores play an essential role. Designing multifunctional nanopores and placing multiple surface functionalities with nanoscale precision remains challenging. Interface effects together with a combination of different materials are used to obtain local multifunctionalization of nanoscale pores within a model pore system prepared by colloidal templating. Silica inverse colloidal monolayers are first functionalized with a gold layer to create a hybrid porous ...

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Section: Resultssupporting

confidence: 92%

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

Ochs

Mohammadi²,

Vogel³

et al. 2020

Small

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“…It is also possible to control the molecular weights of the formed monosubstituted acetylene polymers by employing well‐defined Rh catalysts such as [(nbd)Rh(CCPh)(PPh 3 )] and [(nbd)Rh{C(Ph)CPh 2 }(PPh 3 )] . Substituted linear polyacetylenes prepared with Rh catalysts are transformed into crosslinked polymers by the postpolymerization reactions of pendant functional groups, including crosslinking by subsequent UV irradiation to poly(pentafluorophenyl ethynylbenzoate)s modified with mono o ‐nitrobenzyl‐protected diamine, salicylaldimine‐metal ionic crosslinking reactions of salicylidene Schiff‐base‐containing polyacetylenes, and interchain crosslinking of poly(4‐ethynyl)phenylacetylne by heating . o ‐Diethynylbenzene gives crosslinked polymers, whose network structures are dependent on polymerization catalysts (Rh, Ta) .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crosslinking reaction of polyacetylenes substituted with benzoxazine rings: Thermally highly stable benzoxazine resins

Goto

Sanda

Miyamoto³

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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Novel polyacetylenes, poly(1) and poly(2) substituted with benzoxazine rings were synthesized by the polymerization of the corresponding acetylene monomers 1 and 2 using Rh catalysts, [(nbd)RhCl]2, and (nbd)Rh+B–Ph4 (nbd = 2,5‐norbornadiene). The polymers were heated at 250 °C under N2 to obtain the corresponding polybenzoxazine resins, poly(1)′ and poly(2)′ possessing polyacetylene main chains via the ring‐opening polymerization of the benzoxazine moieties. The polyacetylene backbones were maintained after crosslinking reaction at 250 °C, which were confirmed by Raman spectroscopy. The benzoxazine resins were thermally highly stable as evidenced by differential scanning calorimetry and thermogravimetric analysis. The surface of poly(1)′ film became hydrophilic compared to that of poly(1), while the surfaces of poly(2) and poly(2)′ films showed almost the same hydrophilicity judging from the water contact angle measurement. Poly(1)′ and poly(2)′ exhibited refractive indices smaller than those of poly(1) and poly(2). © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1884–1893

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“…Poly(phenylacetylene)s (PPAs) have been the focus of intense research throughout the past decades . So far, a wide range of functional groups were attached to the phenyl and the acetylene moiety, respectively, to obtain specific properties of the resulting polymers . First, Lam et al published studies of PPAs bearing naphthyl groups as side‐chains for the application as an active layer material in organic light‐emitting diodes (OLEDs).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Poly(phenylacetylene)s with Ru(II) Bis‐Terpyridine Complexes in the Side‐Chain

Breul

Kübel

Häupler

et al. 2014

Macromol. Rapid Commun.

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An alkyne-functionalized ruthenium(II) bis-terpyridine complex is directly copolymerized with phenylacetylene by alkyne polymerization. The polymer is characterized by size-exclusion chromatography (SEC), (1) H NMR spectroscopy, cyclic voltammetry (CV) measurements, and thermal analysis. The photophysical properties of the polymer are studied by UV-vis absorption spectroscopy. In addition, spectro-electrochemical measurements are carried out. Time-resolved luminescence lifetime decay curves show an enhanced lifetime of the metal complex attached to the conjugated polymer backbone compared with the Ru(tpy)2 (2+) model complex.

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Toward Photopatternable Thin Film Optical Sensors Utilizing Reactive Polyphenylacetylenes

Cited by 23 publications

References 38 publications

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

Wetting‐Controlled Localized Placement of Surface Functionalities within Nanopores

Synthesis and crosslinking reaction of polyacetylenes substituted with benzoxazine rings: Thermally highly stable benzoxazine resins

Synthesis and Characterization of Poly(phenylacetylene)s with Ru(II) Bis‐Terpyridine Complexes in the Side‐Chain

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