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Erol Yıldırım

Department of Chemistry
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Influence of hydrogen bond on the mesomorphic behaviour in urethane based liquid crystalline compounds: Experimental and computer simulation study
Korkmaz, Burak; Agtas, Sinem; Sutay, Berkay; Yıldırım, Erol; Yilgor, Iskender; Yurtsever, Mine; Şenkal, Bahire Filiz; Gürsel, Yeşim (Elsevier BV, 2020-11-01)
We present a combined experimental and theoretical study on the novel hydrogen-bonded liquid crystalline complex (UR-LC11) exhibiting both nematic and smectic phases upon cooling. The complex was prepared by mixing 2-(2-me...
Chiral Polyurea from Tartaric Acid Derived and Lysine Backbone: A Synthetic and Computational Study
Ünay, Gizem; Yıldırım, Erol; Akdağ, Akın (2020-11-01)
In recent years, the studies on artificial helical polymers have become an attractive field due to their impressive optical activity and functions. They have numerous potential applications in many areas such as chiral rec...
A comprehensive study: Theoretical and experimental investigation of heteroatom and substituent effects on frontier orbitals and polymer solar cell performances
CEVHER, ŞEVKİ CAN; Hizalan, Gonul; Alemdar Yilmaz, Eda; Cevher, Duygu; Udum Arslan, Yasemin; Toppare, Levent Kamil; Yıldırım, Erol; Çırpan, Ali (2020-09-01)
Benzochalcogendiazole derivatives are incorporated with thieno[3,4-c]pyrrole-4,6-dione (TPD) acceptor and 4,8-diethoxybenzo[1,2-b:4,5-b ']dithiophene donor to synthesize tree-component random copolymers. Four different cop...
Thermoelectric polymer films with a significantly high Seebeck coefficient and thermoelectric power factor obtained through surface energy filtering
Guan, Xin; Yıldırım, Erol; Fan, Zeng; Lu, Wanheng; Li, Bichen; Zeng, Kaiyang; Yang, Shuo-Wang; Ouyang, Jianyong (Royal Society of Chemistry (RSC), 2020-07-01)
Thermoelectric (TE) polymers have unique advantages in converting heat into electricity. But their Seebeck coefficient is lower than that of inorganic TE materials by about one order of magnitude. Here, surface energy filt...
X-ray photoelectron spectroscopy study on the photodegradation of copolyester model compounds
Arangdad, Kiarash; Yıldırım, Erol; Detwiler, Andrew; Cleven, Curtis D.; Burk, Christopher; Shamey, Renzo; Pasquinelli, Melissa A.; Freeman, Harold; El-Shafei, Ahmed (Wiley, 2020-07-01)
The photodegradation of irradiated PETG and PCCT model compounds namely Tm-CHDM-Tm and Tm-TMCD-Tm, where Tm refers to the methyl ester of terephthalic acid, CHDM refers to 1, 4-cyclohexanedimethanol, and TMCD refers to tet...
Effect of substituents in sulfoxides on the enhancement of thermoelectric properties of PEDOT:PSS: experimental and modelling evidence
Zhu, Qiang; Yıldırım, Erol; Wang, Xizu; Kyaw, Aung Ko Ko; Tang, Tao; Soo, Xiang Yun Debbie; Wong, Zicong Marvin; Wu, Gang; Yang, Shuo-Wang; Xu, Jianwei (2020-06-01)
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), being the most popular conductive polymer, has been doped with various additives with the aim of improving its thermoelectric performance. Among all addi...
The Role of Electrostatic Interaction between Free Charge Carriers and Counterions in Thermoelectric Power Factor of Conducting Polymers: From Crystalline to Polycrystalline Domains
Shi, Wen; Yıldırım, Erol; Wu, Gang; Wong, Zicong Marvin; Deng, Tianqi; Wang, Jian-Sheng; Xu, Jianwei; Yang, Shuo-Wang (2020-06-01)
One of the most burning problems in organic thermoelectrics is the lack of deep understanding on the key limiting factors of thermoelectric efficiency at different length scales for conducting polymers. Here, by examining ...
Correlating charge and thermoelectric transport to paracrystallinity in conducting polymers.
Abutaha, A; Kumar, P; Yıldırım, Erol; Shi, W; Yang, SW; Wu, G; Hippalgaonkar, K (2020-04-08)
The conceptual understanding of charge transport in conducting polymers is still ambiguous due to a wide range of paracrystallinity (disorder). Here, we advance this understanding by presenting the relationship between tra...
The impact of [1,2,5]chalcogenazolo[3,4-f]-benzo[1,2,3]triazole structure on the optoelectronic properties of conjugated polymers
Alkan, Ecem Aydan; GÖKER, SEZA; Sarigul, Hatice; Yıldırım, Erol; Udum, Yasemin Arslan; Toppare, Levent Kamil (2020-04-01)
Two novel conjugated near-infrared (NIR) absorbing donor-acceptor type copolymers comprising benzodithiophene as the donor and [1,2,5]chalcogenazolo[3,4-f]-benzo[1,2,3]triazole derivatives as the acceptors, spaced with thi...
Physical Characterization of Inclusion Complexes of Triphenyl Phosphate and Cyclodextrins in Solution.
Zhang, N; Zane, CP; Chen, Y; Yıldırım, Erol; Hinks, D; Tonelli, AE; Vinueza, NR; Pasquinelli, MA (American Chemical Society (ACS), 2020-01-16)
The goal of this work is to provide physical insights into the formation and stability of inclusion complexes (ICs) in aqueous solution between cyclodextrins (CDs) and a common flame retardant, triphenyl phosphate (TPP). Q...