The synthesis of organometallic rod–coil block copolymers from polysilanes

Hiorns, Roger C.; Holder, Simon J.

doi:10.1002/pi.2535

Cited by 10 publications

(8 citation statements)

References 55 publications

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“…The review by Olsen and Segalman gives a clear appraisal of this process and how the phase diagrams of non‐conjugated block copolymers can be modified by this behaviour 205. A wider range of aggregates become available, such as nanowires,206 corkscrews and the like 207–210…”

Section: Conjugated Rod–coil Block Copolymersmentioning

confidence: 99%

Conjugated rod–coil block copolymers and optoelectronic applications

Cuendias¹,

Hiorns²,

Cloutet³

et al. 2010

Polymer International

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This review gives a simple introduction to the electronic, optical and structural behaviour of rod-coil block copolymers in which the rod block is conjugated. The current understanding of the optical properties of conjugated polymers is discussed, as is the self-assembly characteristics of rod-coil block copolymers, along with their behaviour with respect to organic light-emitting diode and photovoltaic devices. Poly(p-phenylene), poly(p-phenylenevinylene) and polythiophenes are then used to give concrete examples and a short history of the developments of this astounding field.can have a strong influence on the type of morphology obtained. The asymmetric nature of the highly rigid conjugated block and the coil block tends to increase the Flory-Huggins parameter (χ ) leading to domain formation even with relatively short polymers and oligomers. 42 Indeed, a wide variation of morphologies has been demonstrated through the preparation of mushroomlike aggregates, 43 honeycomb structures, 44 -47 vesicles 48,49 and cylindrical and lamellar aggregates. 50 -52 And it has been shown that, due to charge confinement within domains, the self-assembly process can be altered by using parameters such as light and temperature. 53 -55 It is apparent that rod-coil copolymers containing conjugated segments can lead to well-defined objects at the nanometric scale and that this in turn leads to the materials having an extraordinary range of applications.This review aims to give an overview of the main applications of π -conjugated systems, highlighting the importance of controlling the ineluctable aggregation phenomena and concentrating on the qualities of rod-coil block copolymers. An initial review of the basic electronic and optoelectronic properties of conjugated polymers along with a brief synopsis of their use and operation in more notable applications is given as this helps to explain the characteristics found and sought for with conjugated rod-coil copolymers. ARCHETYPAL CONJUGATED POLYMERSThe discovery in 1977 that polyacetylene exhibits a conductivity of about 10 3 S cm −1 on doping with Br 2 , I 2 or AsF 5 initiated a true interest in this material. 2 However, polyacetylene exhibits low environmental and thermal stabilities and poor solubilities that limit its technical use. Following these observations, many aromatic conjugated polymers such as poly(p-phenylene) (PPP), 56 polythiophene (PT), 57 polypyrrole 58 and others shown in Fig. 1 were studied. Currently, many other analogues are regularly prepared. Poly(3,4-ethylenedioxythiophene) (PEDOT), marketed by the Bayer company since the 1980s, is one of the most widely exploited. 59 -63 This polymer shows reasonable conductivity (ca 1 S cm −1 ), quasi-transparency in films and high stability in the oxidized state. 62 -64 An important development was the discovery of the green electroluminescence of undoped poly(p-phenylenevinylene) (PPV) by Friend and colleagues in 1990. 65 This breakthrough was followed by the ground-breaking preparation of the first blue PLED based ...

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Section: Conjugated Rod–coil Block Copolymersmentioning

confidence: 99%

Conjugated rod–coil block copolymers and optoelectronic applications

Cuendias¹,

Hiorns²,

Cloutet³

et al. 2010

Polymer International

Self Cite

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“…A detailed study of the mechanism of the living cationic polymerization of the N-silylphosphoranimine, Cl 3 PQNSiMe 3 (12), was reported last year. 54 This work revealed that polymer chain growth occurs more readily at one chain end when the cationic chains are short, e.g.…”

Section: Polyphosphazenes Polyheterophosphazenes and Related Polymersmentioning

confidence: 99%

“…4 Topics included: new developments in the synthesis and functionalization of polysilanes, 11 and the formation of organometallicrich Si polymers. 12 Weinert covered advances in the synthesis and structure of oligogermanes (R 2 Ge) n in a recent perspective article. 13 An interesting article concerning the ability of silole rings and their polymers to undergo aggregation induced photoluminescence was published.…”

Section: Introductionmentioning

confidence: 99%

Inorganic and organometallic polymers

Rivard

2010

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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“…The combined polysilane–organic polymers have interesting characteristic properties in which again the structural properties can be optimized in copolymers and block copolymers by incorporating two or more polymers. The block copolymers give 3D morphologies in bulk state . Self‐assembled block copolymers give a variety of aggregate structures like vesicles, micelles, and micellar fibers .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of organic-inorganic chiral block poly(methylphenylsilane) functional polymers, and study of their optical and chiroptical properties

Meenu

Bag

Saxena

2016

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

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Polysilanes upon UV irradiation give rise to silyl macroradicals which are capable to initiate radical polymerization. Hence, chiral block functional polysilanes were synthesized by UV irradiation of poly(methylphenylsilane) (PMPS) with a vinyl chiral monomer, (R)‐N‐(1‐phenylethyl)methacrylamide (R‐NPEMAM). The synthesized copolymer samples were characterized by FTIR, NMR, and UV–vis spectroscopy. The number and weight average molecular weights of PMPS and synthesized chiral‐block‐PMPS were measured by GPC analysis. Two glass transition temperatures (Tg) of the synthesized materials clearly indicate the formation of chiral‐block‐PMPS copolymers. SEM analysis also indicated the synthesized organic–inorganic block copolymers. The optical and chiroptical properties of the synthesized materials were studied. The cotton effect is observed not only at 276 nm due to aromatic ring of the chiral monomer units but also at 325 nm which is associated with the Si–Si conjugation of PMPS block of synthesized functional polysilanes. Such tunable chirality may find potential application in optoelectronics. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 3626–3634

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The synthesis of organometallic rod–coil block copolymers from polysilanes

Cited by 10 publications

References 55 publications

Conjugated rod–coil block copolymers and optoelectronic applications

Conjugated rod–coil block copolymers and optoelectronic applications

Inorganic and organometallic polymers

Synthesis of organic-inorganic chiral block poly(methylphenylsilane) functional polymers, and study of their optical and chiroptical properties

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