Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Immobilization of [Pd{(Ph2P)2N(CH2)3Si(OCH3)3-κP,P'}X2] (X=Cl, Br) onto Montmorillonite: Investigating their Performance as Homogeneous or Heterogenized Suzuki-Miyaura Catalysts
Δημιουργός/Συγγραφέας:	Stamatopoulos I. Roulia M. Vallianatou K.A. Raptopoulou C.P. Psycharis V. Carravetta M. Papachristodoulou C. Hey-Hawkins E. [EL] Κώστας, Ιωάννης Δ.[EN] Kostas, Ioannis D. Kyritsis P.
Εκδότης:	Wiley-Blackwell
Ημερομηνία:	2017
Γλώσσα:	Αγγλικά
ISSN:	2365-6549
DOI:	10.1002/slct.201702601
Περίληψη:	Two palladium complexes, [Pd{(Ph2P)2N(CH2)3Si(OCH3)3-κP,P'}X2], X=Cl (2), Br (3), were synthesized and characterized by spectroscopic methods and X-ray crystallography. Complexes 2 and 3 contain a PdP2X2square planar coordination sphere exhibiting small endocyclic P–Pd–P angles [71.49(4) and 71.53(5)°, respectively], the magnitude of which is controlled by the formation of the Pd–P–N–P four-membered chelating ring. Complexes 2 and 3 were found to be efficient catalysts in the Suzuki-Miyaura cross-coupling reaction of aryl bromides with phenylboronic acid at ambient or elevated temperature. At 100 °C, using 0.1 mol% of palladium loading, high conversions were observed even after 15 min. Both complexes were immobilized onto STx-1 montmorillonite clay via their -Si(OMe)3moiety, a process investigated by X-ray powder diffraction, X-ray fluorescence spectrometry, solid-state31P NMR spectroscopy and Scanning Electron Microscopy. The immobilized complexes, as heterogenized catalysts, displayed higher activity in the Suzuki-Miyaura coupling compared to that of the free complexes. The recyclability of the former was also explored.
Τίτλος πηγής δημοσίευσης:	ChemistrySelect
Τόμος/Κεφάλαιο:	2
Τεύχος:	36
Σελίδες:	12051-12059
Θεματική Κατηγορία:	[EL] Οργανική χημεία[EN] Organic chemistry
Λέξεις-Κλειδιά:	Crystal structure Immobilized complex Palladium complex PNP Ligand STx–1 montmorillonite Suzuki-Miyaura cross-coupling
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Green
Σημειώσεις:	European Commission, EC; European Geosciences Union, EGU; European Social Fund, ESF; National and Kapodistrian University of Athens. This work was supported, in part, by the Special Account for Research Grants of the National and Kapodistrian University of Athens. It was co-financed by the European Union (EU) (European Social Fund – ESF) and Greek National Funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) – Research Funding Program “Heracleitus II”: Investing in knowledge society through the European Social Fund. E.H.-H., I.D.K and P.K. participated in the activities of the CM0802 Cost Action (PhoSciNet).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο