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Pyrolytic conversion of precursors prepared in Ti(NMe 2 ) 4 –diamine systems
Author(s) -
Koyama Seiichi,
Lizuka Daisuke,
Sugahara Yoshiyuki,
Kuroda Kazuyuki
Publication year - 1998
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199810/11)12:10/11<787::aid-aoc801>3.0.co;2-c
Subject(s) - chemistry , diamine , pyrolysis , pyrolytic carbon , nitrogen , argon , carbon fibers , polymer chemistry , organic chemistry , medicinal chemistry , materials science , composite number , composite material
Precursors possessing Ti–N bonds were prepared by the reactions between Ti(NMe 2 ) 4 and each of three diamines H 2 NCH 2 CH 2 NH 2 , Me(H)NCH 2 CH 2 N(H)Me, HN(CH 2 CH 2 ) 2 NH (Ti(NMe 2 ) 4 :diamine = 1:2), and were converted into ceramics by pyrolysis. The reactions with H 2 NCH 2 CH 2 NH 2 and HN(CH 2 CH 2 ) 2 NH led to the formation of insoluble solids, whereas a soluble oil was obtained by the reaction with Me(H)NCH 2 CH 2 N(H)Me. The pyrolyses under argon gave carbon‐rich Ti(N,C,O) phases,but those under NH 3 – N 2 resulted in the formation of Ti(N,C,O) phases with higher nitrogen contents. Despite the difference in precursor structures the pyrolysis behavior of three precursors under argon was rather similar, suggesting that the precursor obtained from Me(H)NCH 2 CH 2 N(H)Me was effectively cross‐linked during pyrolysis. © 1998 John Wiley & Sons, Ltd.