TY - JOUR
T1 - Production of magnetically recoverable, thermally stable, bio-based catalyst
T2 - Remarkable turnover frequency and reusability in Suzuki coupling reaction
AU - Baran, Talat
AU - Sargın, İdris
AU - Kaya, Murat
AU - Mulerčikas, Povilas
AU - Kazlauskaitė, Sonata
AU - Menteş, Ayfer
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - In any catalysis system, regeneration of the used catalyst is of great importance to reduce the cost of industrial applications. However, recovery of the used catalyst from the reaction medium is a difficult task and this can hinder regeneration process. Magnetic separation has emerged as an effective tool to overcome the recovery problem. Hence, in this study a magnetically recoverable sporopollenin-based Pd catalyst has been designed and used in synthesis of biaryl compounds via Suzuki coupling reaction. The thermally stable catalyst exhibited excellent catalytic behaviour without giving any by-products. It is noteworthy that despite their low product yield of aryl chlorides in coupling reactions, remarkable product yields which are comparable to those of aryl bromides and iodides were recorded for aryl chlorides. With very low catalyst loading (1 × 10−3 mol%), the catalyst gave TOFs values exceeding one million; i.e., 1.237.500 in very short reaction time. Due to its magnetically separable nature, the catalyst could be recovered from the reaction media easily by increasing the reusability of the catalyst. Even in tenth run biphenyl yield dropped from 99 to 93%.
AB - In any catalysis system, regeneration of the used catalyst is of great importance to reduce the cost of industrial applications. However, recovery of the used catalyst from the reaction medium is a difficult task and this can hinder regeneration process. Magnetic separation has emerged as an effective tool to overcome the recovery problem. Hence, in this study a magnetically recoverable sporopollenin-based Pd catalyst has been designed and used in synthesis of biaryl compounds via Suzuki coupling reaction. The thermally stable catalyst exhibited excellent catalytic behaviour without giving any by-products. It is noteworthy that despite their low product yield of aryl chlorides in coupling reactions, remarkable product yields which are comparable to those of aryl bromides and iodides were recorded for aryl chlorides. With very low catalyst loading (1 × 10−3 mol%), the catalyst gave TOFs values exceeding one million; i.e., 1.237.500 in very short reaction time. Due to its magnetically separable nature, the catalyst could be recovered from the reaction media easily by increasing the reusability of the catalyst. Even in tenth run biphenyl yield dropped from 99 to 93%.
KW - Biaryl
KW - Juglans cinerea
KW - Magnetite
KW - Pollen
KW - Schiff base
UR - http://www.scopus.com/inward/record.url?scp=85037690619&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2017.08.104
DO - 10.1016/j.cej.2017.08.104
M3 - Article
AN - SCOPUS:85037690619
SN - 1385-8947
VL - 331
SP - 102
EP - 113
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -