Tris-Functionalized Hybrid Anderson Polyoxometalates: Synthesis, Characterization, Hydrolytic Stability and Inversion of Protein Surface Charge
- Autor(en)
- Amir Blazevic, Emir Al-Sayed, Alexander Roller, Gerald Giester, Annette Rompel
- Abstrakt
Single- and double-sided functionalized hybrid org.-inorg. Anderson polyoxomolybdates with GaIII and FeIII positioned as central heteroatoms have been synthesized in a mild, two-step synthesis in an aq. medium. Compds. 1-4 were isolated as hydrated salts, [TBA]3[GaMo6O18(OH)3{(OCH2)3CCH2OH}]×12 H2O (1) (TBA=tetrabutylammonium), Na3[FeMo6O18{(OCH2)3CCH2OH}2]×11 H2O (2), [TMA]2[GaMo6O18(OH)3{(OCH2)3CNH3}]×7 H2O (3) (TMA=tetramethylammonium), and Na[TMA]2[FeMo6O18(OH)3{(OCH2)3CNH3}](OH)×6 H2O (4). All the compds. were characterized based on single-crystal X-ray diffraction (SXRD), FTIR, UV/Vis, thermogravimetric, ESI-MS, NMR, and elemental analyses. Compd. 1 was also crystd. with two smaller org. cations, giving [TMA]3[GaMo6O18(OH)3{(OCH2)3CCH2OH}]×n H2O (5) and [GDM]3[GaMo6O18(OH)3{(OCH2)3CCH2OH}]×n H2O (6) (GDM=guanidinium) and were characterized based on UV/Vis, NMR, FTIR, and elemental analyses. The use of these compds. as additives in macromol. crystallog. was investigated by examg. their hydrolytic stability by using ESI-MS in a pH range of 4 to 9. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) anal. showed that BSA remains intact in a soln. contg. up to 100 equiv of 1 or 4 over more than four days at 20 °C. Zeta potential measurements demonstrate that 1-4 induce charge inversions on the pos. charged surface of BSA (1 mg mL-1) with concns. starting as low as 1.29 m for compds. 1 and 2, which have the highest neg. surface charge.
- Organisation(en)
- Institut für Biophysikalische Chemie, Institut für Anorganische Chemie, Institut für Mineralogie und Kristallographie
- Journal
- Chemistry: A European Journal
- Band
- 21
- Seiten
- 4762-4771
- Anzahl der Seiten
- 10
- ISSN
- 0947-6539
- Publikationsdatum
- 02-2015
- Peer-reviewed
- Ja
- ÖFOS 2012
- 104004 Chemische Biologie, 104017 Physikalische Chemie, 103006 Chemische Physik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Catalysis, Organic Chemistry
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/trisfunctionalized-hybrid-anderson-polyoxometalates-synthesis-characterization-hydrolytic-stability-and-inversion-of-protein-surface-charge(64284715-e5a6-4d22-a367-24319258ace1).html