Synthesis and characterization of metallo phthalocyanines bearing
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Synthesisandcharacterizationofmetallophthalocyaninesbearing
7-oxy-3-(4-pyridyl)coumarinsubstituentsandtheirsupramolecularstructures
withvanadylbis(acetylacetonate)
AliyeAslıEsenpınara,ElifDurmazb,FatmaKaracac,MustafaBulutb,⇑
aKırklareliUniversity,DepartmentofChemistry,39100Kırklareli,TurkeybMarmaraUniversity,FacultyofArtandScience,DepartmentofChemistry,34722Kadıkoy,Istanbul,TurkeycMarmaraUniversity,DepartmentofChemicalEngineering,34722Kadikoy,Istanbul,Turkey
articleinfo
Articlehistory:Received28December2011Accepted7March2012Availableonline23March2012
Keywords:Coumarin(2H-1-benzopyran-2-one)CobaltPhthalocyaninesVanadylbis(acetylacetonate)Zincabstract
Thesynthesisofnovelzincandcobaltmetallophthalocyanineswithfour7-oxy-3-(4-pyridyl)coumarindyegroupsontheperiphery/non-peripherywerepreparedbycyclotetramerizationof7-(3,4-dicyanophen-oxy)-3-(4-pyridyl)coumarin(1)/7-(2,3-dicyanophenoxy)-3-(4-pyridyl)coumarin(2)andalsoaphthalocy-aninebasedonsupramolecularstructureshavebeenpreparedbythereadycoordinationofpyridinedonorsitesin2,9(10),16(17),23(24)-tetrakis[7-oxo-3-(4-pyridyl)coumarin]-phthalocyaninatozinc(1a)/1,8(11),15(18),22(25)-tetrakis[7-oxo-3-(4-pyridyl)coumarin]-phthalocyaninatozinc(2a)withvanadylbis(acetyl-acetonate).Thenovelchromogeniccompoundswerecharacterizedbyelementalanalysis,1HNMR,Massspectra,FT-IRandUV–Visspectraldata.TheIR-spectraofpreparedcompoundsshowedtwocharacteristicintensebandsat1728–1719cmÀ1forlactonecarbonylandat1592cmÀ1forthea,bunsaturateddoubledbond.Ó2012ElsevierLtd.Allrightsreserved.
1.Introduction
Coumarins,the2H-1-benzopyran-2-onederivatives,areoneof
themostimportantcompoundsofnaturalproductsandinsyn-
theticorganicchemistry.Theyhavebeenusedlargelyinpharma-
ceuticals,perfumery,agrochemicalindustriesasstartingmaterial
orintermediate.Theyarealsousedasfluorescentbrighteners,effi-
cientlaserdyesandasadditivesinfoodandcosmetics[1–3].Sev-
eralbioactivitiesofcoumarins,suchasantibacterial,anticancer,
inhibitoryofplateletaggregation,inhibitoryofsteroid5a-reduc-
taseandinhibitoryofHIV-1protease,havealsobeenreported
[1,4–6].Plantsarethemostimportantsourceofcoumarins,but
extractionfromplantistedious,timeconsumingandneedssophis-
ticatedinstrumentation.Manysyntheticmethods,likePechmann
condensation,Perkin,Reformatsky,Wittigreaction,Knoevenagel
condensationandClaisenrearrangementhavebeeninvestigated
forthesynthesisofcoumarins[7–10].
Phthalocyanines(Pcs)aresyntheticsubstancesrelatedtothe
naturallyoccurringporphyrins.Theyconsistofamacrocyclemade
upoffourisoindoleunitslinkedbyazanitrogenatomsincontrast
tothemethinecarbonatomsinporphyrins[11].Pcs,whichwere
firstdevelopedaspigments,havebeenfoundwidespreadapplica-tionsinmaterialsciences[12]suchaschemicalsensors,photocopy-
ingmachines[13–15],LangmuireBlodgettfilms[16],solarcells,
electrochromism,highenergybatteries[17],fibrousassemblies
[18],coloringforplasticsandmetalsurfacesanddyestuffsforcloth-
ing[19],non-linearoptics[20],liquidcrystals[21],semiconductors
[22],photoconductors,electrochromicdisplays[23]andgassensors
[12,24].Apartfromtheirimportantcontributionsinmaterialssci-
ence,thisclassoffunctionaldyesalsohaspotentialapplications
inthetreatmentofarangeofcancers,infectiousdiseases[25],
andeyeandneurodegenerativediseases[26],mostofwhicharere-
latedtothephotocytotoxiceffectsofthesecompounds.
UnsubstitutedPcsaregenerallydifficulttodissolveinmostor-
ganicsolvents,hence,limitingtheirfurtherapplications.Theintro-
ductionofsubstituentsnotonlyimprovesthesolubilitybutalso
modifiestheirmolecularstructure,andtherefore,theelectrical
andopticalproperties[27].Asaconsequence,variouskindsof
substituents,whichappeartobemainlylimitedtotheelectron-
donatinggroupssuchasalkyl,alkoxyl,andalkylthio,havebeen
introducedontotheperipheral/nonperipheralpositionsofphthalo-
cyanineligand[28–33].Phthalocyaninescoupledwithcoumarin
moietyexhibitbiologicalactivities[34–36].
Inthisstudy,phthalocyaninesbearingpyridylcoumarinsubstit-
uentswerepreparedandtheirZn(II),Co(II)metalcomplexesinves-
tigated.Thecoumarincontainlactonering,whichisinvolvedinthe
pharmaceuticalactivity.7-Hydroxycoumarinsallowbindingthis
structurewithaPcbyphenoxybound.Thiscovalentbinding
0277-5387/$-seefrontmatterÓ2012ElsevierLtd.Allrightsreserved.
http://dx.doi.org/10.1016/j.poly.2012.03.009⇑Correspondingauthor.Tel.:+902163479641x1370;fax:+902163478783.E-mailaddresses:mustafabulut50@gmail.com,mbulut@marmara.edu.tr(M.
Bulut).Polyhedron38(2012)267–274
ContentslistsavailableatSciVerseScienceDirect
Polyhedron
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