Ocak, Ümmühan; Ocak, Miraç; Parlayan, Semanur; Başoǧlu, Aysel; Çaǧlar, Yasemin; Bahadr, Zekeriyya

A series of crown ethers carrying a pyrene group with nitrogensulfur donor atoms, that differ in having three, four and five sulfur atoms in the macrocycle was designed and synthesized by the reaction of the corresponding macrocyclic compound and 1-bromomethylpyrene. The influence of metal cations such as Mn 2+, Fe2+, Fe3+, Co2+, Ni 2+, Cu2+, Zn2+, Cd2+, Hg 2+, Pb2+ and Al3+ on the spectroscopic properties of the ligands was investigated in acetonitriledichloromethane (1:1) by means of absorption and emission spectrometry. Absorption spectra show isosbestic points in the spectrophotometric titration of Fe2+, Zn2+, Cu2+, Pb2+ and Hg2+. The results of spectrophotometric titration experiments disclosed the complexation compositions and complex stability constants of the novel ligands with Fe 2+, Zn2+, Cu2+, Pb2+ and Hg 2+ cations. The monoazatetrathia crown ether showed good sensitivity for Cu2+ with linearity in the range 5.0×10-72. 5×10-6 M and detection limit of 1.6×10-8 M.

AtıfScopus9·WoS9·OpenAlex10

İncele

Parlayan, Semanur; Başoğlu, Aysel; Göbel, Yasemin; Ocak, Miraç; Alp, Hakan; Kantekin, Halit; Ocak, Ümmühan

A new 14-membered crown ether with nitrogen-sulfur donor atom carrying two anthryl groups was designed and synthesized by the reaction of the corresponding macrocyclic compound and 9-(chloromethyl) anthracene. The influence of metal cations such as Al 3+ , Zn 2+ , Fe 2+ , Fe 3+ , Co 2+ , Ni 2+ , Mn 2+ , Cu 2+ , Cd 2+ , Hg 2+ and Pb 2+ on the spectroscopic properties of the ligand was investigated in acetonitrile-dioxane solution (1/1) by means of absorption and emission spectrometry. The results of spectrophotometric titration experiments disclosed the complexation stoichiometry and complex stability constant of the novel ligand with Fe 2+ , Fe 3+ , Al 3+ , Cd 2+ , Cu 2+ , Zn 2+ , Pb 2+ and Hg 2+ cations. Absorption spectra show isobestic points in the spectrophotometric titration of these cations. The presence of excess of Al 3+ , Zn 2+ , Fe 2+ , Fe 3+ , Co 2+ , Ni 2+ , Mn 2+ , Cu 2+ , Cd 2+ , Hg 2+ and Pb 2+ cations caused an enhancement of anthryl fluorescence. Especially, the enhancement in case of the interaction of Hg 2+ and Al 3+ cations with the ligand was pronounced.

AtıfScopus1·WoS1·OpenAlex1

İncele

Ocak, Ümmühan; Ocak, Miraç; Başoǧlu, Aysel; Parlayan, Semanur; Başaran, Dilek; Alp, Hakan; Kantekin, Halit

A series of crown ethers carrying an anthracene group with nitrogen-sulfur donor atom, which differ in having three, four and five sulfur atoms in the macrocycle was designed and synthesized by the reaction of the corresponding macrocyclic compound and 9-chloromethyl-anthracene. The influence of metal cations such as Al3+, Zn2+, Fe2+, Fe3+, Co2+, Ni2+, Mn2+, Cu2+, Cd2+, Hg2+ and Pb2+ on the spectroscopic properties of the ligands was investigated in acetonitrile-dichloromethane (1:1) by means of absorption and emission spectrometry. Absorption spectra show isosbestic points in the spectrophotometric titration of Al3+, Zn2+, Fe2+, Fe3+, Cu2+, Hg2+ and Pb2+ the results of which disclosed the complexation compositions and complex stability constants of the novel ligands with these cations. The monoazapentathia crown ether showed sensitivity for Al3+ with linear range and detection limit of 2.6 × 10-6 M-2.6 × 10-5 M and 8.1 × 10-7 M, respectively.

AtıfScopus10·WoS9·OpenAlex10

İncele

Ocak, Ümmühan; Ocak, Miraç; Başoǧlu, Aysel; Parlayan, Semanur; Alp, Hakan; Kantekin, Halit

Two crown ethers carrying pyrene side arms with nitrogen-sulfur donor atom were designed and synthesized by the reaction of the corresponding macrocyclic compounds and 1-bromomethyl-pyrene. The influence of metal cations such as Al3+, Zn2+, Fe2+, Fe3+, Co2+, Ni2+, Mn2+, Cu2+, Cd2+, Hg2+ and Pb2+ on the spectroscopic properties of the ligands was investigated in acetonitrile-tetrahydrofuran (1:1) by means of absorption and emission spectrometry. Absorption spectra show isosbestic points in the spectrophotometric titration of Al3+, Zn2+, Fe2+, Ni2+, Cu2+, and Pb2+ with 16-membered crown ether. Similar results were obtained for Al3+, Fe2+, Hg2+, Cu2+ and Pb2+ with 14-membered crown ether. The results of spectrophotometric titration experiments disclosed the complexation stoichiometry and complex stability constants of the novel ligands with these cations. According to spectrofluorimetric titration measurements the 14-membered diazadithia crown ether showed sensitivity for Pb2+ with linear range and detection limit of 1.3 × 10-6 to 5.2 × 10-5 M and 5.2 × 10-7 M, respectively. The 16-membered diazadithia crown ether showed sensitivity for Ni2+ with linear range and detection limit of 1.3 × 10-7 to 5.2 × 10-6 M and 4.1 × 10-8 M, respectively.

AtıfScopus9·WoS8·OpenAlex8

İncele

Parlayan, Semanur; Başoǧlu, Aysel; Ocak, M.; Alp, Hakan; Kantekin, Halit; Ocak, Ümmühan

A new crown ether carrying two anthryl groups with nitrogen-sulfur donor atom was designed and synthesized by the reaction of the corresponding macrocyclic compound and 9-chloromethyl anthracene. The influence of metal cations such as Al3+, Zn2+, Fe2+, Fe3+, Co2+, Ni2+, Mn2+, Cu2+, Cd2+, Hg2+ and Pb2+ on the spectroscopic properties of the ligand was investigated in acetonitrile-tetrahydofuran solution (1/1) by means of absorption and emission spectrometry. Absorption spectra show isosbestic points in the spectrophotometric titration of Fe2+, Fe3+, Al3+, Cu2+ and Hg2+. The results of spectrophotometric titration experiments disclosed the complexation stoichiometry and complex stability constant of the novel ligand with Fe2+, Fe3+, Al3+, Cu2+and Hg2+cations. The presence of excess amounts of Al3+, Zn2+, Fe2+, Fe3+, Co2+, Ni2+, Mn2+, Cu2+, Cd2+, Hg2+ and Pb2+ cations caused an enhancement of anthryl fluorescence. The ligand showed good sensitivity for Zn2+ with respect to other metal cations with linear range and detection limit of 1. 4 × 10-7 to 4. 1 × 10-6 M and 1. 0 × 10-8 M respectively.

İncele