Facile Preparation of Titanium(IV)-Immobilized Hierarchically Porous Hybrid Monoliths.
Hierarchically porous materials have become a key feature of biological materials and have been widely applied for adsorption or catalysis. Herein, we presented a new approach to directly prepare a phosphate-functionalized hierarchically porous hybrid monolith (HPHM), which simultaneously contained mesopores and macropores. The design was based on the copolymerization of polyhedral oligomeric vinylsilsesquioxanes (vinylPOSS) and vinylphosphonic acid (VPA) by adding degradable polycaprolactone (PCL) additive. The phosphate groups could be directly introduced into the hybrid monoliths. This approach was simple and time-saving, and overcame the defect of a rigorous, complex process for preparing traditional Ti4+-immobilized metal ion affinity chromatography (IMAC) materials. The specific surface area of an optimal hybrid monolith could reach 502 m2/g obtained by nitrogen adsorption/desorption measurements, which originated from the degradation of PCL. Meanwhile, the characterization of scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) also suggested that the macropores existed in the hybrid monoliths. The size of macropores could be controlled by the content of PCL in the polymerization mixture. The prepared Ti4+-IMAC HPHMs exhibited high adsorption capacity (63.6 mg/g for pyridocal 5'-phosphatemonohydrate), and excellent enrichment specificity (tryptic digest of β-casein/BSA at a molar ratio of 1:1000) and sensitivity (tryptic digest of 5 fmol of β-casein). Moreover, the Ti4+-IMAC HPHMs provided effective enrichment ability of low-abundance phosphopeptides from human serum and HeLa cell digests.
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.|Key Laboratory of Synthetic and Natural Function Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University , Xi'an 710069, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
Haiyang
H
Zhang
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.
Junjie
0000-0002-1672-6119
J
Ou
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
Yating
Y
Yao
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
Hongwei
H
Wang
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
Zhongshan
Z
Liu
Key Laboratory of Synthetic and Natural Function Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University , Xi'an 710069, China.
Yinmao
Y
Wei
Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS) , Dalian 116023, China.
Mingliang
0000-0002-5872-9326
M
Ye
D000327:Adsorption; D000818:Animals; D002364:Caseins / Q000378:metabolism; D002417:Cattle; D002846:Chromatography, Affinity / Q000379:methods*; D006367:HeLa Cells; D006801:Humans; D063065:Organophosphonates / Q000737:chemistry; D017646:Organosilicon Compounds / Q000737:chemistry; D010748:Phosphopeptides / Q000032:analysis* / Q000097:blood / Q000302:isolation & purification; D011091:Polyesters / Q000737:chemistry; D016062:Porosity; D012710:Serum Albumin, Bovine / Q000378:metabolism; D014025:Titanium / Q000737:chemistry*; D014753:Vinyl Compounds / Q000737:chemistry
D002364:Caseins; D063065:Organophosphonates; D017646:Organosilicon Compounds; D010748:Phosphopeptides; D011091:Polyesters; D014753:Vinyl Compounds; C433467:vinylphosphonic acid; C016240:polycaprolactone; D012710:Serum Albumin, Bovine; D014025:Titanium