TY - JOUR
T1 - Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands
AU - Park, Chanwoo
AU - Cho, Chan Mi
AU - Park, Bo Keun
AU - Hong, Chang Seop
AU - Chung, Taek Mo
N1 - Funding Information:
. This work was supported by the Materials and Components Technology Development Program (20010275, Development of ALD precursors for high k thin film in logic and DRAM Flash memory devices) funded by the Ministry of Trade, Industry & Energy (MOTIE, Republic of Korea) and the Development of smart chemical materials for IoT devices Project through the Korea Research Institute of Chemical Technology (KRICT) of Republic of Korea (SS2121‐10)
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/3/29
Y1 - 2022/3/29
N2 - A series of new strontium complexes, [Sr(tmtad)(btsa)]2 (1), [Sr(ptmtad)(btsa)]2 (2), [Sr(etmtad)(btsa)]2 (3), [Sr(tmtad)(tmhd)]2 (4), [Sr(ptmtad)(tmhd)]2 (5), and [Sr(etmtad)(tmhd)]2 (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by 1H- and 13C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.
AB - A series of new strontium complexes, [Sr(tmtad)(btsa)]2 (1), [Sr(ptmtad)(btsa)]2 (2), [Sr(etmtad)(btsa)]2 (3), [Sr(tmtad)(tmhd)]2 (4), [Sr(ptmtad)(tmhd)]2 (5), and [Sr(etmtad)(tmhd)]2 (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by 1H- and 13C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.
KW - ALD precursor Strontium
KW - Dimerization
KW - Group 2 metal
KW - Heteroleptic
UR - http://www.scopus.com/inward/record.url?scp=85127312611&partnerID=8YFLogxK
U2 - 10.1002/slct.202104606
DO - 10.1002/slct.202104606
M3 - Article
AN - SCOPUS:85127312611
SN - 2365-6549
VL - 7
JO - ChemistrySelect
JF - ChemistrySelect
IS - 12
M1 - e202104606
ER -