Hammett ruleとは 意味・読み方・使い方

The phthalocyanine crystal is manufactured by way of a process of bringing a phthalocyanine crystal precursor into contact with an aromatic compound having a fluorine atom bonding directly to the aromatic ring and having a substituent with a substituent constant σm of 0.48 or less according to the Hammett rule.例文帳に追加

芳香環に直接結合するフッ素原子を有し、且つ、Ｈａｍｍｅｔｔ則による置換基定数σｍが０．４８以下である置換基を有する芳香族化合物に、フタロシアニン結晶前駆体を接触させる工程を経て製造する。 - 特許庁

Use is made of a thermoplastic elastomer having as side chains at least two members selected from the group consisting of an aromatic ring having a substituent which a positive substituent constant α of the Hammett's rule, an aromatic ring having a substituent with a negative α, an aromatic ring having no substituent with an α of 0, and a nitrogen-containing heterocyclic ring.例文帳に追加

ハメットの規則の置換基定数σが正の値の置換基を有する芳香環、前記σが負の値の置換基を有する芳香環、前記σが０の無置換の芳香環および含窒素複素環から選ばれる少なくとも２種を側鎖に有する熱可塑性エラストマーを用いる。 - 特許庁