Electrochemical deposition of polypeptides: bio-based covering materials for surface design

Akbulut, Hüseyin; Yavuz, Murat; Guler, Emine; Demirkol, Dilek Odaci; Endō, Takeshi; Yamada, Shuhei; Tımur, Suna; Yaǧcı, Yusuf

doi:10.1039/c4py00079j

Cited by 46 publications

(38 citation statements)

References 62 publications

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“…In recent years, extensive efforts have been performed at polymer binders to develop the electrode performance of Si-Li alloys, on the point of silicon particles with polymers provide a flexible structure by allowing the silicon to expand in buffer matrix and keep the electrode integrity. [34][35][36][37][38][39] Wu et al and Liu et al presented 2 similar polymers which have parallel functional groups for binder in LIBs. [27][28][29] Recent researches have focused on the importance of conductive and flexible polymer binders in order to prevent failure mechanism of silicon anodes.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries

Yuca

Çetintaşoğlu²,

Dogdu³

et al. 2017

Int J Energy Res

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Summary In this research, a novel approach involving the use of a fluorescent and ductile polymer for the high capacity Li‐ion battery application is reported. Poly(fluorene phenylene) copolymer as a conjugated polymer containing with lateral substituents, poly(ethylene glycol) (PEG) units, as a latent building unit for conjugation and electrolyte uptake was prepared and characterized. The synthesis process was carried out via Suzuki coupling reaction with Pd‐based catalyst by using separately obtained PEG functionalized dibromobenzene in combination with dioctylfluorene‐diboronic acid bis(1,3‐propanediol) ester. A flexible and conductive polymer was synthesized and utilized as a binder for high performance Si‐anode. The observed full capacity of cycling of silicon particles, ie, at C/3 with the capacity of 605 mAh/g after 1000th cycle, confirms the good performance without any supplementary conductive additive. The designed and prepared binder polymer with multi‐functionality exhibits better features such as better electronic conductivity, high polarity, good mechanical strength, and adhesion.

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Section: Introductionmentioning

confidence: 99%

Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries

Yuca

Çetintaşoğlu²,

Dogdu³

et al. 2017

Int J Energy Res

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“…[10][11][12][13] Polypeptides play a pivotal role in biological, medical, and pharmaceutical research. Therefore, the synthesis of such polypeptide structures has been a major focus of organic chemistry for over a century.…”

Section: Introductionmentioning

confidence: 99%

Phosgene‐Free Synthesis of Poly(l‐cysteine) Containing Styrene Moiety as a Reactive Function

Akbulut

Yamada

Endō

2017

Macro Chemistry & Physics

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for extreme impurity-free conditions to achieve the polymerization without side reactions, the sensitive nature of NCA for heating, and moisture are major drawbacks of its production toward practical use and chemical modifications. Thus, research on the development of alternative procedures [16][17][18][19][20][21][22] to obtain polypeptides from nontoxic materials with high purity and stability through the development of new synthetic strategies is of great interest in this research area.Quite recently, we have developed a newly synthetic route for the production of NCAs and polypeptides where the intramolecular cyclization of activated urethane derivatives of α-amino acids followed by the ring-opening polymerization of the in situ formed NCA led to the production of polypeptides without the use and production of any toxic compounds. [23][24][25] In this synthetic method, these activated urethane derivatives were readily synthesized by a twostep procedure: (i) the transformation of α-amino acids into the corresponding ammonium salts and (ii) the smooth reaction of N-carbamylation of the salts with diphenyl carbonate (DPC) to afford the corresponding urethane compound. Therefore, polypeptides synthesis using the urethane derivative, which are stable for moisture or heating and available for storing several months at room temperature, is more feasible than traditional ring opening polymerization of highly reactive NCAs in aspect of potential applicability for the convenient preparation of various kinds of functional polypeptides.The side-chain modification of polypeptides is an important tool for creating therapeutic conjugates, generating novel protein constructs and probing natural systems. Research on the combination of some reactive groups with amino acids and the discovery of different initiator systems for NCA-based peptide synthesis have emerged as one of the most popular topics in the synthesis of unique macromolecular architectures in recent years. [26][27][28] However, the sensitive nature of NCAs derivatives only allows two fundamental routes for the preparation of sidechain-modified polypeptides: (i) the prepolymerization modification route where the modified amino acid can be converted to NCA derivatives and then polymerized and (ii) the postpolymerization modification route where a chemically reactive moiety bearing polypeptide on the side chain can react with various functional reagents. [24,29] Polypeptides A novel approach toward the synthesis of N-carboxyanhydride precursor available for postpolymerization modification has been developed through a phosgene-free method offering a safer and green way to obtain peptide monomers under exceptionally mild reaction conditions. The homo and co-polypeptide bearing a reactive styrene moiety are prepared through the polycondensation of N-phenoxycarbonyl derivative of 4-vinylbenzyl-l-cysteine (NPC-Cys(VBn)) with the elimination of phenol and CO 2 while varying the feed ratio to the primary amine initiator to give the corresponding polypeptides without any d...

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“…It catalyses the oxidation reaction of D-glucose (also several aldopyranoses) at C-2 position using oxygen as a co-substrate and produces 2-keto sugars and H2O2. As PyOx catalyses oxidation of sugars at the C-2 position (glucose oxidase, GOx, at C-1) [20][21][22][23]. PyOx recognizes both anomeric forms of glucose, and β-form, as substrates.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Modified Screen Printed Electrodes: Pyranose Oxidase Immobilization Platform for Amperometric Enzyme Sensors

Demirkol

Ozdemir²,

Pilloton³

et al. 2017

SDÜ Fen Bil Enst Der

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Here, a novel enzymatic biosensor was developed using multiwalled carbon nanotube including screen printed electrodes (MWCNT-SPE). Pyranose oxidase (PyOx) was immobilized on the electrode surface by way of gelatin membrane and then cross-linked using glutaraldehyde. Glucose was detected at -0.7 V (vs. Ag/AgCl) by watching consumed oxygen in enzymatic reaction after addition substrate. After optimization of pH and enzyme loading, the linearity was found in the range of 0.1-1.0 mM of glucose. After that, the effect of MCNT on the current was tested. Also the enzymatic biosensor including glucose oxidase instead of pyranose oxidase was prepared and the biosensor response followed for glucose. Furthermore, this system was tested for glucose analysis in soft drinks. Özet: Burada, çok duvarlı karbon nanotüp ile modifiye edilmiş şablonla baskılanmış elektrotları (MWCNT-SPE) kullanarak yeni bir enzimatik biyosensör geliştirilmiştir. Piranoz oksidaz (PyOx) jelatin membran vasıtasıyla elektrotların yüzeyine immobilize edilmiştir ve gluraldehid kullanarak çapraz bağlanma yapılmıştır. Glukoz; enzimatik reaksiyon sırasında kullanılan oksijen takip edilerek -0,7 V'da (Ag/AgCl'e karşı) belirlenmiştir. pH ve enzim miktarının optimizasyonundan sonra, glukoz tayini için doğrusal aralık 0,1-1,0 mM aralığı olarak bulunmuştur. Daha sonra, karbon nanotüplerin biyosensör cevabına etkisi test edilmiştir. Aynı zamanda piranoz oksidaz yerine glukoz oksidaz içeren enzimatik biyosensör hazırlanmıştır ve glukoz için biyosensör cevabı takip edilmiştir. Bunların dışında, içeceklerde glukoz analizi için sistem uygulanmıştır. Karbon Nanotüple Modifiye Edilmiş, Şablonla

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Electrochemical deposition of polypeptides: bio-based covering materials for surface design

Abstract: A simple and efficient approach for the electrochemical deposition of polypeptides as bio-based covering materials for surface design is described.

Cited by 46 publications

References 62 publications

Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries

Highly efficient poly(fluorene phenylene) copolymer as a new class of binder for high-capacity silicon anode in lithium-ion batteries

Phosgene‐Free Synthesis of Poly(l‐cysteine) Containing Styrene Moiety as a Reactive Function

Carbon Nanotube Modified Screen Printed Electrodes: Pyranose Oxidase Immobilization Platform for Amperometric Enzyme Sensors

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