TY - JOUR
T1 - Unraveling the ultrafast behavior of nile red interacting with aluminum and titanium co-doped MCM41 materials
AU - Martin, C
AU - Cohen, B
AU - Navarro, MT
AU - Canos, Avelino Corma
AU - Douhal, A
PY - 2016
Y1 - 2016
N2 - We report on the spectroscopy and photodynamic characterization of Bronsted and Lewis acid sites within solids with respect to the behavior of Nile Red (NR) upon interaction with single- and multimetal( X)-doped MCM41 materials (X = Ti and/or Al) in dichloromethane (DCM) suspensions. The steadystate results show that the H-bonding ability of doped MCM41-based materials leads to different NR populations (monomers, H- and J-aggregates), wherein their contributions are related to the type of acidic site (Bronsted or Lewis) and percent of acid sites (Si/X atomic ratio) in the silica framework. While at different Al doping contents the interacting NR populations suffer slight modifications, an increase in the Ti content induces a substantial increase in J-aggregate formation. Moreover, the picosecond time-resolved data not only confirm the H-bonding interactions between the X-MCM41 hosts and the different types of NR populations, but also indicate that the S-1 deactivation pathways of these
AB - We report on the spectroscopy and photodynamic characterization of Bronsted and Lewis acid sites within solids with respect to the behavior of Nile Red (NR) upon interaction with single- and multimetal( X)-doped MCM41 materials (X = Ti and/or Al) in dichloromethane (DCM) suspensions. The steadystate results show that the H-bonding ability of doped MCM41-based materials leads to different NR populations (monomers, H- and J-aggregates), wherein their contributions are related to the type of acidic site (Bronsted or Lewis) and percent of acid sites (Si/X atomic ratio) in the silica framework. While at different Al doping contents the interacting NR populations suffer slight modifications, an increase in the Ti content induces a substantial increase in J-aggregate formation. Moreover, the picosecond time-resolved data not only confirm the H-bonding interactions between the X-MCM41 hosts and the different types of NR populations, but also indicate that the S-1 deactivation pathways of these
M3 - Article
SN - 1463-9076
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
ER -