RACHEL ESMERALDA RODRIGUEZ GARCIA - Academia.edu (original) (raw)

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Papers by RACHEL ESMERALDA RODRIGUEZ GARCIA

Inorganic Chemistry, 2003

Three Ru 2 5+ diruthenium complexes, (4,0) Ru 2 (2-CH 3 ap) 4 Cl, (3,1) Ru 2 (2-Fap) 4 Cl, and (3... more Three Ru 2 5+ diruthenium complexes, (4,0) Ru 2 (2-CH 3 ap) 4 Cl, (3,1) Ru 2 (2-Fap) 4 Cl, and (3,1) Ru 2 (2,4,6-F 3 ap) 4 Cl where ap is the 2-anilinopyridinate anion, were examined as to their electrochemical and spectroelectrochemical properties in five different nonaqueous solvents (CH 2 Cl 2 , THF, PhCN, DMF, and DMSO). Each compound undergoes a single one-electron metal-centered oxidation in THF, DMF, and DMSO and two one-electron metal-centered oxidations in CH 2 Cl 2 and PhCN. The three diruthenium complexes also undergo two reductions in each solvent except for CH 2 Cl 2 , and these electrode processes are assigned as Ru 2 5+/4+ and Ru 2 4+/3+. Each neutral, singly reduced, and singly oxidized species was characterized by UV−vis thin-layer spectroelectrochemistry, and the data are discussed in terms of the most probable electronic configuration of the compound in solution. The three neutral complexes contain three unpaired electrons as indicated by magnetic susceptibility measurements using the Evans method (3.91−3.95 µ B), and the electronic configuration is assigned as σ 2 π 4 δ 2 π* 2 δ, independent of the solvent. The three singly oxidized compounds have two unpaired electrons in CD 2 Cl 2 , DMSO-d 6 , or CD 3 CN (2.65−3.03 µ B), and the electronic configuration is here assigned as σ 2 π 4 δ 2 π* 2. The singly reduced compound also has two unpaired electrons (2.70−2.80 µ B) in all three solvents, consistent with the electronic configuration σ 2 π 4 δ 2 π* 2 δ* 2 or σ 2 π 4 δ 2 π* 3 δ*. Finally, the overall effect of solvent on the number of observed redox processes is discussed in terms of solvent binding, and several formation constants were calculated.

Cancer Causes & Control, 2012

This study examined factors that influence mammography use and breast cancer detection, including... more This study examined factors that influence mammography use and breast cancer detection, including education, health insurance, and acculturation, among Mexican-American (MA) and African-American (AA) women. The study included 670 breast cancer cases (388 MAs and 282 AAs), aged 40-86 years at diagnosis. Data on mammography use, detection, and delay in seeking care were collected via questionnaires and medical records. Using a language-based bidimensional acculturation measure, MAs were classified as English-dominant (n = 67), bilingual (n = 173), and Spanish-dominant (n = 148). Mammography prior to diagnosis was assessed by racial/ethnic acculturation subgroup using logistic regression. In age-adjusted models, mammography use was non-significantly lower among English-dominant (OR = 0.84; 95% CI: 0.45-1.59) and bilingual (OR = 0.86; 95% CI: 0.55-1.35) MAs and significantly lower among Spanish-dominant MAs (OR = 0.53; 95% CI: 0.34-0.83) than among AA women. After adjustment for education or insurance, there was no difference in mammography use by race/ethnicity and acculturation subgroup. Despite high self-reported mammography use (75%), a large proportion of cases reported self-detection (59%) and delay in seeking care…

Inorganic Chemistry, 2003

Three Ru 2 5+ diruthenium complexes, (4,0) Ru 2 (2-CH 3 ap) 4 Cl, (3,1) Ru 2 (2-Fap) 4 Cl, and (3... more Three Ru 2 5+ diruthenium complexes, (4,0) Ru 2 (2-CH 3 ap) 4 Cl, (3,1) Ru 2 (2-Fap) 4 Cl, and (3,1) Ru 2 (2,4,6-F 3 ap) 4 Cl where ap is the 2-anilinopyridinate anion, were examined as to their electrochemical and spectroelectrochemical properties in five different nonaqueous solvents (CH 2 Cl 2 , THF, PhCN, DMF, and DMSO). Each compound undergoes a single one-electron metal-centered oxidation in THF, DMF, and DMSO and two one-electron metal-centered oxidations in CH 2 Cl 2 and PhCN. The three diruthenium complexes also undergo two reductions in each solvent except for CH 2 Cl 2 , and these electrode processes are assigned as Ru 2 5+/4+ and Ru 2 4+/3+. Each neutral, singly reduced, and singly oxidized species was characterized by UV−vis thin-layer spectroelectrochemistry, and the data are discussed in terms of the most probable electronic configuration of the compound in solution. The three neutral complexes contain three unpaired electrons as indicated by magnetic susceptibility measurements using the Evans method (3.91−3.95 µ B), and the electronic configuration is assigned as σ 2 π 4 δ 2 π* 2 δ, independent of the solvent. The three singly oxidized compounds have two unpaired electrons in CD 2 Cl 2 , DMSO-d 6 , or CD 3 CN (2.65−3.03 µ B), and the electronic configuration is here assigned as σ 2 π 4 δ 2 π* 2. The singly reduced compound also has two unpaired electrons (2.70−2.80 µ B) in all three solvents, consistent with the electronic configuration σ 2 π 4 δ 2 π* 2 δ* 2 or σ 2 π 4 δ 2 π* 3 δ*. Finally, the overall effect of solvent on the number of observed redox processes is discussed in terms of solvent binding, and several formation constants were calculated.

Cancer Causes & Control, 2012

This study examined factors that influence mammography use and breast cancer detection, including... more This study examined factors that influence mammography use and breast cancer detection, including education, health insurance, and acculturation, among Mexican-American (MA) and African-American (AA) women. The study included 670 breast cancer cases (388 MAs and 282 AAs), aged 40-86 years at diagnosis. Data on mammography use, detection, and delay in seeking care were collected via questionnaires and medical records. Using a language-based bidimensional acculturation measure, MAs were classified as English-dominant (n = 67), bilingual (n = 173), and Spanish-dominant (n = 148). Mammography prior to diagnosis was assessed by racial/ethnic acculturation subgroup using logistic regression. In age-adjusted models, mammography use was non-significantly lower among English-dominant (OR = 0.84; 95% CI: 0.45-1.59) and bilingual (OR = 0.86; 95% CI: 0.55-1.35) MAs and significantly lower among Spanish-dominant MAs (OR = 0.53; 95% CI: 0.34-0.83) than among AA women. After adjustment for education or insurance, there was no difference in mammography use by race/ethnicity and acculturation subgroup. Despite high self-reported mammography use (75%), a large proportion of cases reported self-detection (59%) and delay in seeking care…