Volume 3, Issue 1 (International Journal of Optics and Photonics (IJOP) Vol. 3, No. 1, Winter-Spring 2009)                   IJOP 2009, 3(1): 33-44 | Back to browse issues page

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Shahroosvand H, Mohajerani E, Safari N, Osati S, Alidokht I A. Preparation and Optical Properties of Substituted Hydroxyl Porphyrin Nanostructure by UV Light and Green Laser (532 nm) Irradiations. IJOP 2009; 3 (1) :33-44
URL: http://ijop.ir/article-1-213-en.html
Preparation and Optical Properties of Substituted Hydroxyl Porphyrin Nanostructure by UV Light and Green Laser (532 nm) Irradiations
H. Shahroosvand1 , E. Mohajerani * 2, N. Safari1 , S. Osati1 , I. A. Alidokht2
1- Chemistry Department, Shahid Beheshti University
2- Organic Material & Polymer Photonics Lab, laser Research Institute, Shahid Beheshti University
Abstract:   (6527 Views)
Electronic absorption, florescence excitation and AFM studies of selected homogeneous solutions and thin films of mesotetrakis (parahydroxyphenyl) porphyrin (THPP) (1), mesotetrakis (2, 3- dihydroxyphenyl) porphyrin 2, 3-OHPP) (2), mesotetrakis (3, 4-dihydroxyphenyl) porphyrin (3, 4-OHPP) (3) as well as Zn(II) derivative of 2, 3-OHPP (4) under UV lamp and green laser irradiation (532 nm) are acquired and analyzed.Our results indicate that in irradiation experiments, the products of the resulting porphyrins strongly depend on the careful choice of the light source. UV lamp irradiation produced J-type aggregated diacid porphyrins from free base porphyrins by simple photochemical technique. The stabilization of the aggregates structure may be achieved through hydrogen bonding between the protonated core and the peripheral hydroxyl groups, mediated by the chloride anions. The results of laser irradiation experiments shown the formation of J-aggregated porphyrin upon green laser (532 nm) irradiation.Green laser irradiation has been caused the hydrogen bonding interactions between neighboring porphyrin molecules through hydroxyl moieties to produce J-aggregated supramolecular porphyrins. The AFM topographic images and Dynamic Light Scattering (DLS) of THPP(1) under green laser irradiation have been indicated nano-structured porphyrin wires about 5 nm high approximately.
Keywords: Green laser, Self assembly, Diacid, Porphyrin, J-aggregates.
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Type of Study: Research | Subject: General
Received: 2015/03/11 | Accepted: 2015/03/11 | Published: 2015/03/11
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