Department of Chemistry

π-Conjugated nanostructured materials: preparation, properties and photonic applications

Tuncel, D. (Royal Society of Chemistry, 2018)

This article reviews recent advances in p-conjugated nanostructures based on conjugated oligomers and polymers, focusing on their preparation, energy transfer abilities, optoelectronic and laser applications, and photophysical ...

Strategies for plasmonic hot‐electron‐driven photoelectrochemical water splitting

Ghobadi, T. G. U.; Ghobadi, A.; Ozbay, E.; Karadas, F. (Wiley - V C H Verlag GmbH & Co. KGaA, 2018)

Photoelectrochemical water splitting (PEC‐WS) was inspired by the natural photosynthesis process that utilizes sunlight energy to produce chemical energy through splitting water to form hydrogen and oxygen. One recent ...

A method for voltage noise measurement and ıts application to primary batteries

Uzundal, C. B. (ECS, 2018)

Though proven effective in localized corrosion studies, electrochemical noise measurements in batteries with Lithium based chemistries suffer from lack of well–defined measurement and analysis methods. The high capacitance ...

Phenothiazine-based polymer cathode materials with ultrahigh power densities for lithium ion batteries

Peterson, B. M.; Ren, D.; Shen, L.; Wu, Y. -C. M.; Ulgut, B.; Coates, G. W.; Abruna, H. D.; Fors, B. P. (American Chemical Society, 2018)

Lithium ion batteries (LIBs) currently deliver the highest energy density of any known secondary electrochemical energy storage system. However, new cathode materials, which can deliver both high energy and power densities, ...

Electrocatalytic hydrogen evolution with cobalt–poly (4-vinylpyridine) metallopolymers

Kap, Z.; Ülker, E.; Nune, S. V. K.; Karadas, F. (Springer Netherlands, 2018)

Abstract: A facile synthetic pathway using poly(4-vinylpyridine) as a polypyridyl platform is reported for the formation of a metallopolymer. Electrochemical studies indicate that the metallopolymer acts as an efficient ...

A cyanide-based coordination polymer for hydrogen evolution electrocatalysis

Alsaç, E. P.; Ulker, E.; Nune, S. V. K.; Karadas, F. (Springer New York LLC, 2018)

Abstract: Research on H2 production has recently been directed to the development of cost-efficient and robust heterogeneous catalysts for hydrogen evolution reaction (HER). Given the promising catalytic activities of ...

Investigation of the hydrogen bond donating ability of 1,8-naphthalenediol by NMR spectroscopy and its use as a hydrogen bonding catalyst

Turkmen, Y. E. (TUBITAK, 2018)

The hydrogen bond donating ability of 1,8-naphthalenediol was investigated via a series of 1H, 13C, and 31P NMR experiments. Complexation studies using triphenylphosphine oxide and cyclohexanone as hydrogen bond acceptors ...

Analysis of electrochemical noise in NiCd batteries throughout their lifetime

Ülgüt, B. (TUBITAK, 2018)

Electrochemical noise measurements have been applied to electrochemical systems that show stochastic behavior. The standard area of study that benefits from this stochastic analysis is localized corrosion modes like pitting ...

Concentrated solar radiation promoted unconventional greener approach: Solvent-free benign synthesis of functionalized benzimidazoles

Harsh, S.; Yusuf, M.; Sharma, R.; Kumar, Y.; Kumar, R. (Arkat, 2018)

Renewable concentrated solar-radiation (CSR) offered a promising en route for the development of practical, highly efficient, scalable, catalyst free and solvent-free clean process leading to the synthesis of functionalized ...

Improved dental implant drill durability and performance using heat and wear resistant protective coatings

Er, N.; Alkan, A.; Ilday, S.; Bengu, E. (Academic Press, 2018)

The dental implant drilling procedure is an essential step for implant surgery, and frictional heat in bone during drilling is a key factor affecting the success of an implant. The aim of this study was to increase the ...

A Noble-Metal-Free Heterogeneous Photosensitizer-Relay Catalyst Triad That Catalyzes Water Oxidation under Visible Light

Ghobadi, T. G. U.; Yildiz, E. A.; Buyuktemiz, M.; Akbari, S. S.; Topkaya, D.; İsci, Ü.; Dede, Y.; Yaglioglu, H. G.; Karadas, F. (Wiley-VCH Verlag, 2018)

An entirely earth-abundant chromophore-relay water oxidation catalyst triad system, which is robust and efficient at neutral pH, is presented. The synthesis involves the coordination of a porphyrin derivative to a bridging ...

Minimizing friction, wear, and energy losses by eliminating contact charging

Sayfidinov, K.; Cezan, S. D.; Baytekin, B.; Baytekin, H. T. (American Association for the Advancement of Science, 2018)

One-fourth of the global energy losses result from friction and wear. Although friction and tribocharging were presented to be mutually related, reduction of friction and wear by eliminating tribocharges on common polymers, ...

Artificial heliotropism and nyctinasty based on optomechanical feedback and no electronics

Baytekin, B.; Cezan, S. D.; Baytekin, H. T.; Grzybowski, B. A. (Mary Ann Liebert, 2018)

Although plants are typically not considered an inspiration for designing motile robots, they do perform a variety of intricate motion patterns, including diurnal cycles of sun tracking (heliotropism) and leaf opening ...

Molten salt assisted self-assembly: synthesis of mesoporous LiCoO2 and LiMn2O4 thin films and investigation of electrocatalytic water oxidation performance of lithium cobaltate

Saat, G.; Balci, F. M.; Alsaç, E. P.; Karadas, F.; Dag, Ö. (Wiley-VCH Verlag, 2018)

Mesoporous thin films of transition metal lithiates (TML) belong to an important group of materials for the advancement of electrochemical systems. This study demonstrates a simple one pot method to synthesize the first ...

[2+2] cycloadditions of sorbyl tosylate with imines/1-azadienes: a one-pot domino approach for α-alkylidene-β-lactams and their computational studies and antimicrobial evaluation

Kumar, Y.; Bedi, P. M. S.; Singh, P.; Adeniyi, A. A.; Singh-Pillay, A.; Singh, P.; Bhargava, G. (Wiley-Blackwell, 2018)

The manuscript describes a straightforward and atom-efficient method for the synthesis of α-alkylidene-β-lactams using sorbyl tosylate and imines/1-azadienes at high temperature (80 °C). The Density functional theory ...

Regioselective copper(I)-catalyzed ullmann amination of halopyridyl carboxylates using sodium azide: a route for aminopyridyl carboxylates and their transformation to pyrido[2, 3-d]pyrimidin-4(1H)-ones

Nisha; Sharma, Mr. C.; Kumar, R.; Kumar, Y. (Wiley-Blackwell, 2018)

We report herein an efficient, straightforward and ligand free synthesis of aminopyridyl carboxylates, an important building block used in pharmaceuticals and agrochemicals. The C(sp2)-N bond formation utilize a readily ...

Synthesis of mesoporous LiMn2O4 and LiMn2−xCoxO4 thin films using the MASA approach as efficient water oxidation electrocatalysts

Balci, F. M.; Karakaya, I.; Alsaç, E. P.; Yaman, M. Y.; Saat, G.; Karadas, F.; Ülgüt, B.; Dag, O. (Royal Society of Chemistry, 2018)

Mesoporous, highly active, robust, and cost-effective thin films are in big demand for water splitting by electrocatalysis. Molten-salt assisted self-assembly (MASA) is an effective method to synthesize mesoporous thin ...