TY - JOUR
T1 - Design and application of sporopollenin microcapsule supported palladium catalyst
T2 - Remarkably high turnover frequency and reusability in catalysis of biaryls
AU - Baran, Talat
AU - Sargin, Idris
AU - Kaya, Murat
AU - Menteş, Ayfer
AU - Ceter, Talip
N1 - Publisher Copyright:
© 2016 Elsevier Inc.
PY - 2017/1/15
Y1 - 2017/1/15
N2 - Bio-based catalyst support materials with high thermal and structural stability are desired for catalysts systems requiring harsh conditions. In this study, a thermally stable palladium catalyst (up to 440 °C) was designed from sporopollenin, which occurs naturally in the outer exine layer of pollens and is widely acknowledged as chemically very stable and inert biological material. Catalyst design procedure included (1) extraction of sporopollenin microcapsules from Betula pendula pollens (∼25 μm), (2) amino-functionalisation of the microcapsules, (3) Schiff base modification and (4) preparation of Pd(II) catalyst. The catalytic activity of the sporopollenin microcapsule supported palladium catalyst was tested in catalysis of biaryls by following a fast, simple and green microwave-assisted method. We recorded outstanding turnover number (TON: 40,000) and frequency (TOF: 400,000) for the catalyst in Suzuki coupling reactions. The catalyst proved to be reusable at least in eight cycles. The catalyst can be suggested for different catalyst systems due to its thermal and structural durability, reusability, inertness to air and its eco-friendly nature.
AB - Bio-based catalyst support materials with high thermal and structural stability are desired for catalysts systems requiring harsh conditions. In this study, a thermally stable palladium catalyst (up to 440 °C) was designed from sporopollenin, which occurs naturally in the outer exine layer of pollens and is widely acknowledged as chemically very stable and inert biological material. Catalyst design procedure included (1) extraction of sporopollenin microcapsules from Betula pendula pollens (∼25 μm), (2) amino-functionalisation of the microcapsules, (3) Schiff base modification and (4) preparation of Pd(II) catalyst. The catalytic activity of the sporopollenin microcapsule supported palladium catalyst was tested in catalysis of biaryls by following a fast, simple and green microwave-assisted method. We recorded outstanding turnover number (TON: 40,000) and frequency (TOF: 400,000) for the catalyst in Suzuki coupling reactions. The catalyst proved to be reusable at least in eight cycles. The catalyst can be suggested for different catalyst systems due to its thermal and structural durability, reusability, inertness to air and its eco-friendly nature.
KW - Betula pendula
KW - Pollen
KW - Schiff base
KW - Silylation
KW - Suzuki coupling reaction
UR - http://www.scopus.com/inward/record.url?scp=84988966464&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2016.09.071
DO - 10.1016/j.jcis.2016.09.071
M3 - Article
C2 - 27701017
AN - SCOPUS:84988966464
SN - 0021-9797
VL - 486
SP - 194
EP - 203
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -