Abstract We examined the synthetic and catalytic claims that immobilization of an Fe-PNP pincer complex ( 1 ) on an amine-modified graphene oxide support yields a useful heterogeneous catalyst for the Suzuki biaryl cross-coupling reaction. Complex 1 is not formed under the reported conditions, rather the iron sulfate heptahydrate starting material (melanterite) undergoes partial dehydration to give iron sulfate tetrahydrate (rozenite). Neither rozenite nor melanterite are catalytically competent. Graphic Abstract

中文翻译：

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非活性铁物种的固定化能否开启铃木反应的催化活性？

摘要 我们研究了合成和催化声明，即在胺改性的氧化石墨烯载体上固定 Fe-PNP 钳形复合物 (1) 可为 Suzuki 联芳基交叉偶联反应生成有用的多相催化剂。在报道的条件下未形成配合物 1，而是七水合硫酸铁起始材料 (melanterite) 进行部分脱水，得到四水合硫酸铁 (rozenite)。菱铁矿和墨镍铁矿都没有催化能力。图形摘要