Yazar "Demirbaş, Ümit" için listeleme
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Continuous-wave Tm:YLF laser with ultrabroad tuning (1772-2145 nm)
Demirbaş, Ümit; Thesinga, Jelto; Beyatlı, Ersen; Kellert, Martin; Pergament, Mikhail; Kärtner, Franz X. (Optica Publishing Group, 2022)We report detailed experimental data aiming for rigorous investigation of Tm:YLF laser performance, especially with a focus on tuning behavior. Continuous-wave (cw) lasing performance of Tm:YLF crystals with thulium dopings ... -
Düşük iyon katkılı, diyot-pompalı, verimli ve yüksek güçlü Cr:Licaf lazer sistemlerinin geliştirilmesi ve karakterize edilmesi
Bilinen lazer malzemeleri arasında Cr:LiCAF lazer malzemesi, yakın kızılaltı bölgede, Ti: Safir?den sonra bilinen en geniş kazanç bandına sahip malzemelerdendir. Cr:LiCAF lazerleri 745-885 nm aralığında lazer ışınımı ... -
Efficient Tm:YAG and Tm:LuAG lasers pumped by 681 nm tapered diodes
Beyatlı, Ersen; Sumpf, Bernd; Erbert, Götz; Demirbaş, Ümit (OSA - The Optical Society, 2019)In this paper, we present highly efficient continuous-wave (cw) laser operation of Tm:YAG and Tm:LuAG lasers pumped by high-brightness red tapered diodes. The single-emitter tapered diode lasers (TDLs) provide up to 1 W ... -
Efficient Tm:YAG and Tm:LuAG lasers pumped by red tapered diodes
Beyatlı, Ersen; Sumpf, Bernd; Erbert, Götz; Demirbaş, Ümit (Institute of Electrical and Electronics Engineers Inc., 2019)Eye-safe, diode-pumped all-solid-state lasers working in the 2 ?m region are favourable for many applications including remote sensing, medicine, and gas sensing. Tm-doped crystals such as Tm:YAG and Tm:LuAG are among the ... -
Efficient Tm:YAG and Tm:LuAG lasers pumped by red tapered diodes - 2
Beyatlı, Ersen; Sumpf, Bernd; Erbert, Götz; Demirbaş, Ümit (OSA - The Optical Society, 2019)Eye-safe, diode-pumped all-solid-state lasers working in the 2 ?m region are favourable for many applications including remote sensing, medicine, and gas sensing. Tm-doped crystals such as Tm:YAG and Tm:LuAG are among the ... -
The electrochemical and spectroelectrochemical properties of metal free and metallophthalocyanines containing triazole/piperazine units
Demirbaş, Ümit; Akyüz, Duygu; Mermer, Arif; Akçay, Hakkı Türker; Demirbaş, Neslihan; Koca, Atıf; Kantekin, Halit (Pergamon-Elsevier Science Ltd, 2016)The synthesis and characterization of novel peripherally tetra [1,2,4]-triazole substituted metal-free phthalocyanine and its metal complexes (Zn(II), Ni(II), Pb(II), Cu(II) and Fe(II)) and the investigation of electrochemical ... -
Electrochemical and spectroelectrochemical study on novel non-peripherally tetra 1,2,4-triazole substituted phthalocyanines
Demirbaş, Ümit; Akyüz, Duygu; Akçay, Hakkı Türker; Koca, Atif; Bekircan, Olcay; Kantekin, Halit (Elsevier Science Bv, 2018)In the present study novel tetra 4-(4-fluorophenyI)-5-(4-methoxypheny1)-4H-1,2,4-triazole-3-thio substituted non-peripherally metal free (4), zinc(II) (5), lead (II) (6) and copper(II) (7) phthalocyanines were synthesized. ... -
Electrochemistry of novel phthalocyanines bearing 1,2,4 triazole groups
Akyüz, Duygu; Demirbaş, Ümit; Akçay, Hakkı Türker; Menteşe, Emre; Koca, Atif; Kantekin, Halit (Wiley-V C H Verlag Gmbh, 2020)The phthalonitrile (3) and triazole substituted metallo phthalocyanines (MPc) (4-7) were prepared. the novel compounds were characterized with spectroscopic data. Electrochemical analyses of metallophthalocyanines (4-7) ... -
Electrochemistry of novel tetra peripherally and non-peripherally substituted phthalocyanines bearing morpholine groups
Akyüz, Duygu; Demirbaş, Ümit; Akçay, Hakkı Türker; Koca, Atıf; Kantekin, Halit (Elsevier Science Sa, 2020)Morpholine bearing phthalonitriles (3a and 3b) and peripherally and non-peripherally tetra substituted TiOPc and CuPc complexes (4a-5b) were prepared. Electrochemical responses of metallophthalocyanines were analysed and ... -
Experimental and computational studies on 4-[(3,5-dimethyl-1H-pyrazol-1-yl) methoxy]phthalonitrile and synthesis and spectroscopic characterization of its novel phthalocyanine magnesium(ii) and tin(ii) metal complexes
Akçay, Hakkı Türker; Bayrak, Rıza; Şahin, Ertan; Karaoğlu, Kaan; Demirbaş, Ümit (Elsevier B.V., 2013)The molecular structure of the substituted phthalonitrile was analyzed crystallographically and compared with optimized geometric structure. The structural properties of the compound such as energy, vibrational frequency, ... -
Metallo-phthalocyanines containing triazole substituents: Synthesis, spectroscopic and photophysicochemical properties
Demirbaş, Ümit; Öztürk, Dilek; Akçay, Hakkı Türker; Durmuş, Mahmut; Menteşe, Emre; Kantekin, Halit (Taylor & Francis Ltd., 2022)Magnesium(II) (4), lead(II) (5) and zinc(II) (6) phthalocyanines were prepared. The structures of 4-6 were confirmed by the spectroscopic characterization such as FT-IR, H-1-NMR, MALDI-TOF mass, UV-vis and fluorescence ... -
Non-peripherally tetra substituted lead(II), nickel(II) and copper(II) phthalocyanines bearing [1,2,3] triazole moeties: Synthesis, characterization and investigation of electrochemical and spectroelectrochemical properties
Demirbaş, Ümit; Akyüz, Duygu; Akçay, Hakkı Türker; Koca, Atıf; Kantekin, Halit (Elsevier Science Bv, 2019)In this study, the synthesis and characterization of novel [1,2,3] triazole substituted phthalonitrile compound (3) and non-peripherally tetra 3-(2H-benzo[d][1,2,3]triazol-2-yl)-4-hydroxyphenethyl methacrylate substituted ... -
Non-peripherally tetra substituted phthalocyanines bearing benzodioxane moieties: Synthesis, characterization and investigation of electrochemical and spectroelectrochemical properties
Demirbaş, Ümit; Akyüz, Duygu; Akçay, Hakkı Türker; Koca, Atıf; Kantekin, Halit (Elsevier Science Bv, 2019)The 1,4-benzodioxane substituted phthalonitrile compound (3) and non-peripherally tetra substituted cobalt(II) (4), nickel(II) (5) and copper(II) (6) phthalocyanine complexes were synthesized. the structural characterization ... -
Novel 1,2,4-triazole substituted metallo-phthalocyanines: Synthesis, characterization and investigation of electrochemical and spectroelectrochemical properties
Demirbaş, Ümit; Akyüz, Duygu; Akçay, Hakkı Türker; Koca, Atıf; Menteşe, Emre; Kantekin, Halit (Elsevier Science Bv, 2018)The phthalonitrile compound (3) and peripherally tetra substituted zinc(II) (4), nickel (II) (5), iron (II) (6), cobalt (II) (7) and copper (II) (8) phthalocyanines were synthesized for the first time in this study. the ... -
Novel phthalocyanines bearing 1,2,4 triazole substituents: Synthesis, characterization, photophysical and photochemical properties
Demirbaş, Ümit; Özçifçi, Zehra; Akçay, Hakkı Türker; Menteşe, Emre (Pergamon-Elsevier Science Ltd, 2020)4-(4,5-Diphenyl-4H-1,2,4-triazol-3-ylthio)phthalonitrile ( 3) and its non-peripherally tetra substituted zinc(II) phthalocyanine (4) and magnesium(II) phthalocyanine (5) derivatives were prepared. the novel compounds 3-5 ... -
Novel phthalocyanines bearing fluoro-methylquinolin substituents: Synthesis, characterization, photophysical and photochemical properties
Demirbaş, Ümit; Özçifçi, Zehra; Akçay, Hakkı Türker (Elsevier, 2024)The novel 4-((6-fluoro-2-methylquinolin-4-yl)oxy)phthalonitrile (3a), 3-((6-fluoro-2-methylquinolin-4-yl)oxy)phthalonitrile (3b), tetra 6-fluoro-2-methylquinolin-4-yl)oxy substituted zinc(II) phthalocyanines (4a and 4b) ... -
Novel triazole substituted phthalocyanines showing high singlet oxygen quantum yields
Demirbaş, Ümit; Bayrak, Rıza; Dilber, Gülsev; Menteşe, Emre; Akçay, Hakkı Türker (Elsevier, 2019)In this study, novel triazole peripherally substituted phthalocyanine zinc(II) complexes 3(a-d) were synthesized from four different phthalonitrile derivative and characterized by FT-IR NMR, MALDI-TOF, UV-Vis methods. ... -
The novel Zn(II) phthalocyanines: Synthesis, characterization, photochemical, DNA interaction and cytotoxic/phototoxic properties
Barut, Burak; Yalçın, Can Özgür; Demirbaş, Ümit; Akçay, Hakkı Türker; Kantekin, Halit; Özel, Arzu (Elsevier, 2020)In this study, peripherally and non-peripherally tetra substituted water soluble zinc(II) phthalocyanines (5a and 5b) were synthesized and characterized. Their photochemical and ct-DNA binding properties of them were ... -
Synthesis of some new Methoxy Bridged Benzimidazolyl-Substituted phthalocyanines as potent inhibitors of urease
Demirbaş, Ümit; Menteşe, Emre; Sökmen, Bahar Bilgin; Bayrak, Rıza; Akçay, Hakkı Türker (Elsevier Science Sa, 2018)In this study, the novel peripherally 4-[(2-methyl-1H-benzimidazol-1-yl)methoxy] substituted Zn(II) (3) Cu(II) (4), Co(II) (5) phthalocyanines were prepared and their structures were characterized spectro-scopically. the ... -
Synthesis, characterisation, photophysical and photochemical properties of free-base tetra-(5-chloro-2-(2,4-dichlorophenoxy) phenoxy)phthalocyanine and respective zinc(II) and lead(II) complexes
Demirbaş, Ümit; Pişkin, Mehmet; Akçay, Hakkı Türker; Barut, Burak; Durmuş, Mahmut; Kantekin, Halit (Elsevier Science Sa, 2017)In this study, novel peripherally tetra-(5-chloro-2-(2,4-dichlorophenoxy)phenol) substituted metal-free (4), zinc(II) (5) and lead(II) (6) phthalocyanine derivatives were synthesised. the novel phthalocyanines (4-6) were ...
