Publication:
Irgacure 2959-functionalized poly(ethyleneimine)s as improved photoinitiators: enhanced water solubility, migration stability and visible-light operation

dc.contributor.coauthorEren, Tugce Nur
dc.contributor.coauthorKariksiz, Neslihan
dc.contributor.coauthorTuncel, Duygu
dc.contributor.coauthorOkte, Neren
dc.contributor.coauthorAvci, Duygu
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorDemirci, Gözde
dc.contributor.kuauthorAcar, Havva Funda Yağcı
dc.contributor.kuprofileMaster Student
dc.contributor.kuprofileFaculty Member
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.yokidN/A
dc.contributor.yokid178902
dc.date.accessioned2024-11-09T23:37:22Z
dc.date.issued2021
dc.description.abstractTwo novel water soluble polymeric photoinitiators (PPIs) (PEI-I2959 and PEI-I2959-Ts) for free radical polymerization have been synthesized by introducing 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959 or I2959) functionality into branched poly(ethyleneimine) (M-w = 1800 g mol(-1)). These PPIs show an excellent water-solubility of 35-45 g L-1, thus exceeding the solubility of I2959 by 7-9-fold. PPIs show strong absorbance at 274 nm (epsilon similar to 2-3 times larger than that of I2959); and less prominent peaks at 320 and 380 nm for PEI-I2959 and PEI-I2959-Ts, respectively, in water. The aza-Michael addition (similar to 10% conversion) and high photopolymerization efficiencies (90-100% conversion) under both UV and visible light are obtained by photo-differential scanning calorimetry (photo-DSC) and Real-Time Fourier Transform Infrared (RT-FTIR) spectroscopy. The photopolymerization mechanisms involve charge transfer complex formation, verified by absorption studies and enabling visible light polymerization; and a Type I mechanism. PEI-I2959-Ts exhibits 8 times higher migration stability than I2959 due to its high molecular weight. In tests against NIH/3T3 and L929 mouse embryonic fibroblast cells using the MTT cell viability assay, the non-cytotoxicity of PEI-I2959-Ts is shown and PEI-I2959 shows reasonable cell viability at lower concentrations, indicating that PPIs have potential usage in biomaterials.
dc.description.indexedbyWoS
dc.description.indexedbyScopus
dc.description.issue18
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsorshipBogazici University Research Fund [16741] The authors would like to acknowledge financial support from the Bogazici University Research Fund (16741).
dc.description.volume12
dc.identifier.doi10.1039/d1py00298h
dc.identifier.eissn1759-9962
dc.identifier.issn1759-9954
dc.identifier.scopus2-s2.0-85105861572
dc.identifier.urihttp://dx.doi.org/10.1039/d1py00298h
dc.identifier.urihttps://hdl.handle.net/20.500.14288/12814
dc.identifier.wos641724900001
dc.languageEnglish
dc.publisherRoyal Soc Chemistry
dc.sourcePolymer Chemistry
dc.subjectPolymer science
dc.titleIrgacure 2959-functionalized poly(ethyleneimine)s as improved photoinitiators: enhanced water solubility, migration stability and visible-light operation
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.authorid0000-0003-4952-7981
local.contributor.authorid0000-0001-5601-8814
local.contributor.kuauthorDemirci, Gözde
local.contributor.kuauthorAcar, Havva Funda Yağcı
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2Graduate School of Sciences and Engineering
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