Photoinduced Decomposition of Dibenzoyldiethylgermane: A Photochemical Route to Polygermanes

Durmaz, Yasemin Yüksel; Küküt, Manolya; Monszner, Norbert; Yaǧcı, Yusuf

doi:10.1021/ma900253v

Cited by 24 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An anologous compound based on germanium, namely dibenzoyldiethylgermane (DBDEG) was shown to have better absorption characteristics and improved initiation behavior 20. Quite recently, we have demonstrated that photoinduced α‐scission from the both sides of DBDEG and successive coupling of the resulting radicals leads to the formation of oligogermanes22 (Scheme ). In contrast to the existing synthetic methods, the described photochemical method is not sensitive to high purity conditions and can be performed simply by controlled irradition of DBDEG in solution.…”

Section: Introductionmentioning

confidence: 99%

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Durmaz

Küküt

Moszner

et al. 2009

J. Polym. Sci. A Polym. Chem.

Self Cite

View full text Add to dashboard Cite

A block copolymer of cyclohexene oxide (CHO) and styrene (St) was prepared by using bifunctional visible light photoinitiator dibenzoyldiethylgermane (DBDEG) via a two‐step procedure. The bifunctionality of the photoinitiator pertains to the sequential photodecomposition of DBDEG through acyl germane bonds. In the first step, photoinitiated free radical promoted cationic polymerization of CHO using DBDEG in the presence of diphenyliodonium hexafluorophosphate (Ph2I+PF 6−) was carried out to yield polymers with photoactive monobenzoyl germane end groups. These poly(cyclohexene oxide) (PCHO) prepolymers were used to induce photoinitiated free radical polymerization of styrene (St) resulting in the formation of poly(cyclohexene oxide‐block‐styrene) (P(CHO‐b‐St)). Successful blocking has been confirmed by a strong change in the molecular weight of the prepolymer and the block copolymer as well as NMR, IR, and DSC spectral measurements. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4793–4799, 2009

show abstract

Section: Introductionmentioning

confidence: 99%

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Durmaz

Küküt

Moszner

et al. 2009

J. Polym. Sci. A Polym. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, Ge‐2 showed a significantly increased quantum yield of photodecomposition compared to BAPO, an excellent photobleaching effect and an outstanding photoinitiation activity in aqueous acidic formulations or dental composites 78. The photolysis of Ge‐2 in the absence of monomer causes scission and multiple coupling reactions forming polygermanes 79. To optimize the properties of Ge‐2, a number of new dibenzoylgermanium derivatives were synthesized (Scheme ) 80.…”

Section: Enamel–dentin Adhesivesmentioning

confidence: 99%

Patient‐reported outcome measures suitable to assessment of patient navigation

Fiscella

Ransom

Jean‐Pierre

et al. 2011

Cancer

View full text Add to dashboard Cite

In the past 10 years, many new components were synthesized and evaluated for an application in enamel–dentin adhesives and direct composite restoratives. New bisacrylamide cross‐linkers with improved hydrolytic stability and new strongly acidic polymerizable phosphonic acids and dihydrogen phosphates, as well as novel photoinitator systems, in combination with the implementation of novel application devices, have significantly improved the performance of the current enamel–dentin adhesives. The currently used resins for direct composite restoratives are mainly based on methacrylate chemistry to this day. A continuous improvement of the properties of current composites was achieved with the use of new tailor‐made methacrylate cross‐linkers, new additives, and photoinitiators as well as tailor‐made fillers. Nowadays, dental adhesives and methacrylate‐based direct restorative materials have found wide‐spread acceptance. Nevertheless, future developments in the field of dental adhesives and direct composite restoratives will focus on improving durability and biocompatibility as well as the development of materials with a broader application spectrum and of smart adhesives or composites. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

show abstract

“…42 A novel photochemical route to polyorganogermanes, [R 2 Ge] n, was described. 43 Exposure of dibenzoyldiethylgermane to radiation at 300-440 nm led to the extrusion of the benzoyl groups and formation of poly(diethylgermane) 8 in narrow polydispersity (PDI = 1.01-1.14) and low molecular weights (1.4-2.8 Â 10 3 g mol À1 ). Preliminary results also indicate that polymer 8 is a suitable photoinitiator for the polymerization of styrene.…”

Section: Polysilanes Polygermanes Polystannanes Polycarbosilanes and ...mentioning

confidence: 99%

Inorganic and organometallic polymers

Rivard

2010

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

View full text Add to dashboard Cite

Photoinduced Decomposition of Dibenzoyldiethylgermane: A Photochemical Route to Polygermanes

Cited by 24 publications

References 25 publications

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Patient‐reported outcome measures suitable to assessment of patient navigation

Inorganic and organometallic polymers

Contact Info

Product

Resources

About