2001
DOI: 10.1002/1615-9314(20010101)24:1<49::aid-jssc49>3.0.co;2-0
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Synthesis, characterization, and chromatographic evaluation of titanium tetrabutoxide-modified silica as a support for HPLC-RP separations in alkaline mobile phases

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Cited by 27 publications
(15 citation statements)
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“…Initial tests of chemical stability of these zirconized silica-based phases were very promising, resulting in significantly greater stability for zirconized-silica based stationary phase using alkaline mobile phases. 82 Simultaneous with the development of sorbed and gamma immobilized PMOS stationary phases based on zirconized silica supports, Collins and co-workers 83,84,89 prepared a new type of stationary phase based on the immobilization of PMOS onto titanized silica particles. The procedure for obtaining the titanized silica support was very similar to that used for the zirconized silica by Melo and Jardim.…”
Section: Metalized Silica-based Immobilized Polymer Stationary Phasesmentioning
confidence: 99%
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“…Initial tests of chemical stability of these zirconized silica-based phases were very promising, resulting in significantly greater stability for zirconized-silica based stationary phase using alkaline mobile phases. 82 Simultaneous with the development of sorbed and gamma immobilized PMOS stationary phases based on zirconized silica supports, Collins and co-workers 83,84,89 prepared a new type of stationary phase based on the immobilization of PMOS onto titanized silica particles. The procedure for obtaining the titanized silica support was very similar to that used for the zirconized silica by Melo and Jardim.…”
Section: Metalized Silica-based Immobilized Polymer Stationary Phasesmentioning
confidence: 99%
“…In addition, residual zirconol (Zr-OH) and titanol (Ti-OH) groups may behave as Lewis acid sites. [81][82][83][84][85][86][87][88][89][90][91][92][93][94] Fonseca 95 observed that separation of a test mixture containing phenol, N,N-dimethylaniline, naphthalene and acenaphthene with a titanized-silica based PMOS phase showed inversion of the elution order of N,N-dimethylaniline and naphthalene peaks due to the strong interaction between the basic analyte and residual groups. This interaction was more pronounced with lower immobilization times or temperatures of the thermal treatment used to prepare the PMOS phases.…”
Section: Metalized Silica-based Immobilized Polymer Stationary Phasesmentioning
confidence: 99%
“…Uma possibilidade é a modificação da sua superfície, aproveitando as suas propriedades favoráveis, tais como rigidez e reprodutibilidade de tamanho de poro e de partícula. A modificação superficial da sílica cromatográfica com os óxidos de magnésio 21 , zircônio 22,23 e titânio [24][25][26] já foi relatada com resultados promissores, após a preparação de fases estacionárias com polímero adsorvido e imobilizado na sua superfície.…”
Section: Suportesunclassified
“…Sílica, após a reação com tetrabutóxido de zircônio, resulta em sílica zirconizada (ºSi-O-ZrO x ) 22,23 , enquanto a reação de sílica com tetrabutóxido de titânio ou tetracloreto de titânio produz sílica titanizada (ºSi-O-TiO x ) [24][25][26] . Estes dois novos suportes foram recobertos com PMOS pelo méto-do de evaporação do solvente.…”
Section: Fases Estacionárias Com Polímeros Adsorvidos E Imobilizados unclassified
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