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Kaya, Beraat Umur
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01. Izmir Institute of Technology
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Sustainable Development Goals
1NO POVERTY
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2ZERO HUNGER
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3GOOD HEALTH AND WELL-BEING
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4QUALITY EDUCATION
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5GENDER EQUALITY
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6CLEAN WATER AND SANITATION
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7AFFORDABLE AND CLEAN ENERGY
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8DECENT WORK AND ECONOMIC GROWTH
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
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10REDUCED INEQUALITIES
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11SUSTAINABLE CITIES AND COMMUNITIES
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
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13CLIMATE ACTION
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14LIFE BELOW WATER
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15LIFE ON LAND
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
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17PARTNERSHIPS FOR THE GOALS
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Scholarly Output
6
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5
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5754/954
Supervised MSc Theses
1
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WoS Citation Count
42
Scopus Citation Count
45
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0
WoS Citations per Publication
7.00
Scopus Citations per Publication
7.50
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1
Supervised Theses
1
| Journal | Count |
|---|---|
| Chemical Communications | 1 |
| Dyes and Pigments | 1 |
| Journal of Materials Chemistry B | 1 |
| Organic & Biomolecular Chemistry | 1 |
| Organic & Biomolecular Chemistry | 1 |
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6 results
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Now showing 1 - 6 of 6
Master Thesis Fluorescent Gold Ion Sensors: Design, Synthesis and Imaging(01. Izmir Institute of Technology, 2021) Emrullahoğlu, Mustafa; Kaya, Beraat Umur; Emrullahoğlu, Mustafa; 01. Izmir Institute of Technology; 04.04. Department of Photonics; 04. Faculty of ScienceOf all transition metals, gold has long sustained attention owing to its unique chemical and physical properties. Beyond that, the ease of processing gold allows its use in science, industry, and in various chemical, biological, and medical applications. For example, gold is used in medicine to treat rheumatoid arthritis, asthma, cancer, and brain and skin lesions. However, the extensive use of gold compounds can adversely impact the natural environment and biological systems due to their potential toxicity. For those reasons, identifying trace amounts of gold species in solution and cell media is crucial. Unlike the detection methods of atomic absorption spectroscopy, atomic emission spectroscopy, and inductively coupled plasma spectrometry, fluorescence-based detection methods offer easy sample preparation, rapid response, high sensitivity, reproducibility, and efficiency, all at a low cost. Today, various types of fluorescent sensors selective to gold ions have been designed, typically with BODIPY, fluorescein, rhodamine, naphthalimide, and coumarin-based fluorophores. In the work for this thesis, for the first time an enyne-derived BODIPY-based sensor was designed and synthesised to identify Au3+ ions, after which photophysical changes in the presence and absence of the analyte were examined both in solutions and in cells.Article Citation - WoS: 2A Reaction-Based Scenario for Fluorescence Probing of Au(iii) Ions in Human Cells and Plants [2](Royal Soc Chemistry, 2023) Eren, Merve Cevik; Karakaya, Hüseyin Çağlar; Eren, Ahmet; Varlıklı, Canan; Dartar, Suay; Dartar, Suay; Kaya, Beraat Umur; Kaya, Beraat Umur; Ucuncu, Muhammed; Varlıklı, Canan; Karakaya, Hüseyin Çağlar; 04.01. Department of Chemistry; 01. Izmir Institute of Technology; 04.03. Department of Molecular Biology and Genetics; 04.04. Department of Photonics; 04. Faculty of ScienceA BODIPY-based fluorophore decorated with a gold specific reactive handle (e.g., 2-alkynylallyl alcohol) displayed a ratiometric fluorescence change in response to Au3+ ions with extraordinary selectivity over other competing metal species, including Hg2+, Cu2+, Zn(2+ )and Pd2+. By way of a gold-catalyzed intramolecular cyclisation-isomerisation reaction sequence, a BODIPY construct with an extended p-conjugation transformed into a new structure with a relatively short p-system. This unique chemical transformation was accompanied by, and resulted in, a dramatic shift in the emission and absorption wavelength, which could be monitored as distinct changes in the color of the solution's emission. Apart from its outstanding analytical performance in solution, including a quick response time (<10 s), unique specificity, a high-fold ratiometric change (62-fold), and a remarkably low detection limit (358 nM), the probe also proved useful in monitoring Au3+ ions in human cells and plants (e.g., Nicotiana benthamiana).Article Citation - Scopus: 3A Reaction-Based Scenario for Fluorescence Probing of Au(iii) Ions in Human Cells and Plants(Royal Soc Chemistry, 2023) Eren, Merve Cevik; Emrullahoğlu, Mustafa; Dartar, Suay; Varlıklı, Canan; Kaya, Beraat Umur; Varlikli, Canan; Emrullahoglu, Mustafa; 04.01. Department of Chemistry; 01. Izmir Institute of Technology; 04.04. Department of Photonics; 04. Faculty of ScienceA BODIPY-based fluorophore decorated with a gold specific reactive handle (e.g., 2-alkynylallyl alcohol) displayed a ratiometric fluorescence change in response to Au3+ ions with extraordinary selectivity over other competing metal species, including Hg2+, Cu2+, Zn2+ and Pd2+. By way of a gold-catalyzed intramolecular cyclisation-isomerisation reaction sequence, a BODIPY construct with an extended p-conjugation transformed into a new structure with a relatively short p-system. This unique chemical transformation was accompanied by, and resulted in, a dramatic shift in the emission and absorption wavelength, which could be monitored as distinct changes in the color of the solution's emission. Apart from its outstanding analytical performance in solution, including a quick response time (<10 s), unique specificity, a high-fold ratio-metric change (62-fold), and a remarkably low detection limit (358 nM), the probe also proved useful in monitoring Au3+ ions in human cells and plants (e.g., Nicotiana benthamiana).Article Citation - WoS: 22Citation - Scopus: 22Fluorescein Propiolate: a Propiolate- Decorated Fluorescent Probe With Remarkable Selectivity Towards Cysteine(Royal Society of Chemistry, 2019) Karakuş, Erman; Sayar, Melike; Kaya, Beraat Umur; Kaya, Beraat Umur; Emrullahoğlu, Mustafa; Dartar, Suay; Emrullahoğlu, Mustafa; 04.01. Department of Chemistry; 01. Izmir Institute of Technology; 04.04. Department of Photonics; 04. Faculty of ScienceA fluorescent probe decorated with an alkynyl ester unit (e.g. propiolate) displayed a selective turn-on type fluorescent response towards cysteine. Following a sequential addition-cyclisation pathway mediated by the addition of cysteine, the pre-fluorescent dye rapidly transformed into a new structure and induced a fluorescent response clearly observable with the naked eye.Article Citation - WoS: 14Citation - Scopus: 16Bodipy-Based Organic Color Conversion Layers for Wleds(Elsevier, 2020) Yüce, Hürriyet; Dartar, Suay; Güner, Tuğrul; Kaya, Beraat Umur; Dartar, Suay; Emrullahoğlu, Mustafa; Kaya, Beraat Umur; Yüce, Hürriyet; Emrullahoğlu, Mustafa; Demir, Mustafa Muammer; Demir, Mustafa Muammer; 03.09. Department of Materials Science and Engineering; 04.01. Department of Chemistry; 01. Izmir Institute of Technology; 04.04. Department of Photonics; 03. Faculty of Engineering; 04. Faculty of ScienceThe usage of organic dyes in phosphor conversion layer of WLED is an attractive approach since they have high molar extinction coefficient and photostability. Various types of organic pigments have been employed for this purpose such as BODIPY, perylene diimide, Rhodamine B, pyrene, Nile red, etc. Among those, BODIPY-based organic dyes appear to be promising candidate for white light generation. In this work, for the first time, red and green emitting BODIPY-based organic molecules have been used as colour conversion layer. These molecules were associated with PMMA in DMF solution and the resulting solution was subjected to electrospinning. Colorful electrospun mats were embedded into PDMS matrix and their free-standing PDMS composite films were used as color conversion layers over blue LED to produce white light such that CRI of 95 and CCT of 4200 K was achieved. These values show that BODIPY-based organic molecules containing fiber composites are promising candidates to be used as color conversion layers for white light applications.Article Citation - WoS: 4Citation - Scopus: 4Tailored Bodipy-Based Fluorogenic Probes for Phosgene Detection: a Comparative Evaluation of Recognition Sites(Royal Soc Chemistry, 2024) Dartar, Suay; Emrullahoğlu, Mustafa; Kaya, Beraat Umur; Kaya, Beraat Umur; Yayak, Yanki Oncu; Vural, Ezgi; Vural, Ezgi; Dartar, Suay; Emrullahoglu, Mustafa; 01. Izmir Institute of Technology; 04.01. Department of Chemistry; 04.04. Department of Photonics; 04. Faculty of ScienceWe constructed two novel boron-dipyrromethene (BODIPY)-based fluorescent probes, BOPD and BOBA, each equipped with the phosgene specific recognition units o-phenylenediamine (OPD) and o-aminobenzylamine (OBA) at the 2-position of the BODIPY core. BOPD and BOBA represent rare examples of BODIPY-based probes that operate by modulating an intramolecular charge transfer process (ICT), as validated by computational studies. We systematically compared the analytic performance of those recognition units while focusing on selectivity, fluorescence turn-on ratios and response times. Probe BOBA, equipped with OBA as the recognition unit, demonstrated a remarkably low detection limit (i.e., 1.40 nM) and a rapid response time (<10 s) for triphosgene. By comparison, BOPD, featuring an OPD unit, showed superior selectivity towards triphosgene, with a detection limit of 93 nM and a response time of up to 30 s. A portable sensing platform was developed by loading BOPD onto test strips made of TLC plates, nonwoven materials and small-headed cotton swabs, which were assessed for their effectiveness in detecting phosgene. We additionally performed the first successful application of a fluorescent probe, namely BOPD, for monitoring the accumulation of phosgene in plants.