On Tuning the Fluorescence Emission of Porphyrin Free Bases Bonded to the Pore Walls of Organo-Modified Silica

Molecules

Rosa I.Y. Quiroz-Segoviano¹  Iris N. Serratos¹  Fernando Rojas-González¹  Salvador R. Tello-Solís¹  Rebeca Sosa-Fonseca³  Obdulia Medina-Juárez¹  Carmina Menchaca-Campos² 

[1] Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F. 09340, Mexico;Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av. Universidad 1001, Col. Chamilpa, C.P. 62209, Cuernavaca Mor., Mexico;Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F. 09340, Mexico

关键词: porphyrin;    fluorescence;    tetrapyrrole macrocycles;    xerogel;    sol-gel;   

DOI  :  10.3390/molecules19022261

来源: mdpi

【 摘 要 】

A sol-gel methodology has been duly developed in order to perform a controlled covalent coupling of tetrapyrrole macrocycles (e.g., porphyrins, phthalocyanines, naphthalocyanines, chlorophyll, etc.) to the pores of metal oxide networks. The resulting absorption and emission spectra intensities in the UV-VIS-NIR range have been found to depend on the polarity existing inside the pores of the network; in turn, this polarization can be tuned through the attachment of organic substituents to the tetrapyrrrole macrocycles before bonding them to the pore network. The paper shows clear evidence of the real possibility of maximizing fluorescence emissions from metal-free bases of substituted tetraphenylporphyrins, especially when these molecules are bonded to the walls of functionalized silica surfaces via the attachment of alkyl or aryl groups arising from the addition of organo-modified alkoxides.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.