Study by thermal methods on some new cyclic ylides and derivatives

被引：4

作者：

Moldoveanu, C. ^{[1
]}

Odochian, Lucia ^{[1
]}

Mangalagiu, I. ^{[1
]}

Dumitras, M. ^{[1
]}

Apostolescu, N. ^{[2
]}

机构：

[1] Alexandru Ioan Cuza Univ, Fac Chem, Iasi, Romania

[2] Gh Asachi Univ, Fac Chem Engn, Iasi, Romania

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2008年 / 93卷 / 03期

关键词：

cyclic ylides; DTA; DTG; mass spectrometry; spiranes; TG; thermal analysis;

D O I：

10.1007/s10973-007-8918-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The study is devoted to the characterization by TG, DTG, DTA, both in air and N-2 atmosphere, of three cyclic ylides as well as two spirane derivatives, to the purpose of elucidating the correlation between structure, thermostability and thermal degradation mechanism. Thermal analysis data indicated that the degradation mechanism is characteristic for every sample, and the consequences of structural peculiarities are discussed. The thermostability series of the samples is correlated to their structure. The quantitative TG-DTG-DTA analysis allowed sonic considerations on the thermal degradation mechanism, subsequently confirmed by mass spectrometry. The inciting points obtained by DTA and Boetius measurements along with the initial degradation temperatures from TG-DTG-DTA Curves indicates the temperature range for the use and storage of these compounds. considering 1hat some derivatives of cyclic ylides show biological activity and potential medical applications.

引用

页码：907 / 914

页数：8

共 19 条

[1] Synthesis, characterization and thermal studies on solid compounds of 2-chlorobenzylidenepyruvate of heavier trivalent lanthanides and yttrium(III)
Bannach, G
Schnitzler, E
Treu, O
Utuni, VHS
Ionashiro, M
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2006, 83 (01) : 233 - 240
[2] Barrall E. M., 1973, THERMOCHIM ACTA, V5, P577
[3] CAPROSU M, 2001, ARKIVOC, P1
[4] Study on the influence of PTFE particle size on the polymer thermal behavior - I. Melting
Dumitras, M
Odochian, L
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2002, 69 (02): : 599 - 606
[5] Mangalagiu G., 2001, Annales Pharmaceutiques Francaises, V59, P139
[6] Mangalagiu I, 1998, Ann Pharm Fr, V56, P181
[7] MOLDOVEANU C, 2006, ACTION CYCLIN UNSATU, P119
[8] 4-methyl- and 4-(halophenyl)pyrimidinium (4-halobenzoyl)methylides. Correlation of structure, stability, reactivity, and biological activity
Moldoveanu, CC
Mangalagiu, II
[J]. HELVETICA CHIMICA ACTA, 2005, 88 (10) : 2747 - 2756
[9] Study of the nature of the crystallization water in some magnesium hydrates by thermal methods
Odochian, L
[J]. JOURNAL OF THERMAL ANALYSIS, 1995, 45 (06): : 1437 - 1448
[10] Study by thermal methods on the materials obtained by dye removal from waste waters with beech flour
Odochian, Lucia
Dulman, Viorica
Dumitras, M.
Pui, A.
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2007, 89 (02) : 625 - 631

← 1 2 →