title: Ultrasonic method for the preparation of organic porphyrin nanoparticles.
abstract: We report the synthesis and optical properties of organic porphyrin nanoparticles with narrow size distribution and good dispersibility. Nanoparticles were produced by a combination of precipitation and sonication, termed the "ultrasonic method". The resulting [tetrakis(para-chlorophenyl)porphyrin]TClPP nanoparticles were stable in solution without precipitation for at least 30 days. No self aggregation of the constituent porphyrin chromophores was observed. The TClPP nanoparticles exhibited interesting optical properties, particularly a large bathochromic shift in the absorption spectra.
authors.affiliation: Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran, Iran.
authors.forename: Mohamad Mehdi
authors.initials: MM
authors.lastname: Kashani-Motlagh
authors.forename: Rahmatollah
authors.initials: R
authors.lastname: Rahimi
authors.forename: Marziye Javaheri
authors.initials: MJ
authors.lastname: Kachousangi
mesh_terms: D002625:Chemistry, Organic / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D055620:Optical Phenomena; D009930:Organic Chemicals / Q000138:chemical synthesis* / Q000737:chemistry; D011166:Porphyrins / Q000138:chemical synthesis* / Q000737:chemistry; D012996:Solutions; D012997:Solvents / Q000737:chemistry; D013010:Sonication; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
chemical_list: D009930:Organic Chemicals; D011166:Porphyrins; D012996:Solutions; D012997:Solvents; D014867:Water