Synthesis and characterization of metallo phthalocyanines bearing

  • 格式:pdf
  • 大小:985.07 KB
  • 文档页数:8

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

journalhomepage:www.elsevier.com/locate

/

p

oly