Formation of fluorescent aggregates in Rhodamine 6G doped silica glasses

Fluorescence properties of dye doped mesoporous silica

“…3b. [43] As also observed for type I silica-Rh6G hybrids (here not reported for sake of brevity), [36,37,39,42] a spectral shift of the PL emission is recorded as a function of dye concentration or excitation wavelength: a bathocromic shift of about 5-6 nm for both dye concentration increase or excitation wavelength decrease from 533 to 471 nm. It should be however noted that when exciting at 337 nm the emission peak shifts back to 559 nm.…”

“…In the last years our endeavor has been dedicated to study hybrid systems for photonic and biomediacal applications, in particular taking into account a model system obtained by combining mesoporous silica and Rhodamine 6G (Rh6G) [27,28,[36][37][38][39][40][41][42][43][44][45][46]. In this paper we report a review of the results we obtained in this study and the perspective of future developments.…”

Fluorescent AlPO4 gels and glasses doped with Rhodamine 6G: Preparation, structural and optical characterization

“…Besides presenting much lower fluorescence efficiency themselves, the aggregates are efficient quenchers of the monomeric emission, giving rise to a drastic decrease in intensity at 530 nm. Thus, the lasing properties of Rh6G can be critically hindered by such aggregation effects [6][7][8][9][10]. Fig.…”

“…Among the dye molecules under consideration, Rhodamine 6G (Rh6G) is one of the most popular candidates for future applications in solid-state dye lasers, which have advantages over liquid state dye lasers by being nonvolatile, nonflammable, nontoxic, compact, and more thermally and mechanically stable. Over the years, efficient procedures have been developed for incorporating Rh6G into solid matrices such as PMMA [2,3], silica gel [4][5][6], silicate glasses [7][8][9], and molecular sieves [10][11][12][13][14]. One of the challenges encountered in this research is the need to control and/or limit Rh6G molecular aggregation, which adversely affects the optical properties [15].…”

Sol–gel prepared AlPO4 with incorporating Rhodamine 6G

“…One of the most important applications is the solid-state dye laser, which have advantages over liquidstate dye lasers by being nonvolatile, nonflammable, nontoxic, compact and mechanically stable. Limited by the sol-gel synthesis, the matrices used in dye laser are mostly microporous silicate glass [2][3][4], polymers [5] and porous molecular sieves [6]. However, in order to achieve the high efficiency, the mesopore (2-50 nm) size glass with high surface area and thermal stability is essential.…”