蛇菰宁在正/负离子模式下ESI-MS/MS的裂解途径研究  

Research on the ESI-MS/MS Fragmentation Pathway of Balanophonin in Positive and Negative Ion Mode

作　　者：王天山[1] WANG Tianshan(School of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158,China)

机构地区：[1]海南师范大学化学与化工学院,海南海口571158

出　　处：《海南师范大学学报（自然科学版）》2022年第4期398-401,共4页Journal of Hainan Normal University（Natural Science）

摘　　要：在正/负离子模式下,采用电喷雾串联质谱法研究一种苯骈二氢呋喃型新木脂素类化合物——蛇菰宁的质谱裂解途径。分别对该化合物的准分子离子m/z 379[M+Na]+和337[M-HH2O]-进行碰撞诱导解离,获得它们的二级质谱碎片离子信息。实验结果表明,正离子模式下的碎片离子主要表现出化合物的主要官能团的裂解行为。例如,C-8位的羟甲基既可以脱水,也可以丢失1个甲醇分子,生成的双键可以跟苯环形成共轭体系。C-1′位的氧代丙烯基可以丢失1个甲醛分子,也可在加合离子Na+的诱导下发生裂解。而负离子模式下的碎片离子则反映了此类木脂素的化学骨架裂解。综合分析这2种模式下的质谱裂解信息对苯骈二氢呋喃型新木脂素类化合物的化学结构鉴定具有重要的参考价值。This research investigated on the fragmentation pathway of balanophonin,a dihydrobenzofuran-type neolignan by electrospray ionization tandem mass spectrometry(ESI-MS/MS)in positive and negative ion mode.The m/z 379[M+Na]+and 337[M-H-H2O]-ions fragmented into product ions upon collision-induced dissociation(CID).The fragmentation ions in positive spectrum demonstrated the structural feature of functional groups.In the case of methylol group at C-8 position,this compound showed dehydration and neutral loss of methanol,and the generated double bond can form a conjugated system with benzene ring.The oxypropenyl group at C-1′site can lose one HCHO molecule or undergo cleavage induced by the adduction of Na+.Whereas the fragmentation ions in the negative ion mode reflect the chemical skeleton cleavage of these lignans.Comparison of the product ions spectra in both positive and negative ion mode has important reference value for the chemical structure identification of dihydrobenzofuran-type neolignans.

关 键 词：苯骈二氢呋喃型新木脂素 蛇菰宁 电喷雾串联质谱 裂解途径 

分 类 号：O657.63[理学—分析化学]