MALDI/TOF/MS and SEC study of astromol dendrimers having cyano end groups

被引:20
作者
Bu, LJ
Nonidez, WK
Mays, JW [1 ]
Tan, NB
机构
[1] Univ Alabama, Dept Chem, Birmingham, AL 35294 USA
[2] USA, Ballist Res Lab, Polymers Res Branch, Aberdeen Proving Ground, MD 21005 USA
关键词
D O I
10.1021/ma990458p
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI/TOF/MS), size exclusion chromatography (SEC), and dilute solution viscometry were used to analyze the structure of three generations of Astromol (trademark of DSM) dendrimers having cyano end groups. The molecular weights, the defect contents, and. the structures of the "imperfect" dendrimers were determined by MALDI/TOF/MS analysis with fractions collected using a SEC fraction collector. The peak broadening observed for these materials in SEC was studied by adding different co-solvents to the SEC mobile phase. The hydrodynamic radius of the dendrimers was measured both by dilute solution viscometry and by SEC universal calibration. Our radii data are comparable to previously published results for these dendrimers obtained by neutron scattering and support the opinion that dendrimers have compact spherical structures.
引用
收藏
页码:4445 / 4452
页数:8
相关论文
共 26 条
[11]   Electrospray mass spectrometry of poly(propylene imine) dendrimers - The issue of dendritic purity or polydispersity [J].
Hummelen, JC ;
vanDongen, JLJ ;
Meijer, EW .
CHEMISTRY-A EUROPEAN JOURNAL, 1997, 3 (09) :1489-1493
[12]   Protonation mechanism of poly(propylene imine) dendrimers and some associated oligo amines [J].
Koper, GJM ;
vanGenderen, MHP ;
ElissenRoman, C ;
Baars, MWPL ;
Meijer, EW ;
Borkovec, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (28) :6512-6521
[13]  
LAFERLA RJ, 1997, CHEM PHYS, V106, P678
[14]   POLYMER MOLECULAR-WEIGHT DISTRIBUTION - RESULTS FROM MATRIX-ASSISTED LASER-DESORPTION IONIZATION COMPARED WITH THOSE FROM GEL-PERMEATION CHROMATOGRAPHY [J].
LEHRLE, RS ;
SARSON, DS .
RAPID COMMUNICATIONS IN MASS SPECTROMETRY, 1995, 9 (01) :91-92
[15]   EFFECT OF SOLVENT ON CONCENTRATION-DEPENDENCE OF HYDRODYNAMIC VOLUMES AND GPC ELUTION VOLUMES [J].
MAHABADI, HK ;
RUDIN, A .
POLYMER JOURNAL, 1979, 11 (02) :123-131
[16]   Hyperbranched polymers: A review [J].
Malmstrom, E ;
Hult, A .
JOURNAL OF MACROMOLECULAR SCIENCE-REVIEWS IN MACROMOLECULAR CHEMISTRY AND PHYSICS, 1997, C37 (03) :555-579
[17]   INTRINSIC-VISCOSITY OF MODEL STARBURST DENDRIMERS [J].
MANSFIELD, ML ;
KLUSHIN, LI .
JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (10) :3994-3998
[18]   Dendrimers - Branching out from curiosities into new technologies [J].
Matthews, OA ;
Shipway, AN ;
Stoddart, JF .
PROGRESS IN POLYMER SCIENCE, 1998, 23 (01) :1-56
[19]   UNIQUE BEHAVIOR OF DENDRITIC MACROMOLECULES - INTRINSIC-VISCOSITY OF POLYETHER DENDRIMERS [J].
MOUREY, TH ;
TURNER, SR ;
RUBINSTEIN, M ;
FRECHET, JMJ ;
HAWKER, CJ ;
WOOLEY, KL .
MACROMOLECULES, 1992, 25 (09) :2401-2406
[20]  
Newkome G. R., 1992, ALDRICHIM ACTA, V25, P31