Identifying the influence of atomic order on the catalytic reactivity of bimetallic catalysts is essential for their rational design. However, the synthesis of atomically-ordered nanostructures under mild conditions is not trivial and in many cases a mixture of various compositions is formed. Here we show a simple and highly versatile approach for synthesis of Pt-Co bimetallic nanoporous network (BNN) and demonstrate the influence of preparation conditions on the BNN’s atomic order and catalytic reactivity. High surface area Pt3Co BNN was prepared by reduction of [Co(NH3)5Cl][PtCl4] double complex salt crystals. The BNN phase was transformed from Pt3Co to segregated Pt and Co domains once the reduction temperature of the double complex salt crystals was elevated. High selectivity toward hydrodeoxygenation of biomass-derived 5-hydroxymethylfurfural into 2,5-dimethylfuran was obtained while catalyzing the reaction with Pt3Co BNN. The catalytic yield was deteriorated by more than an order of magnitude while catalyzing the reaction with BNN that was constructed of segregated Pt and Co domains. Spectroscopic analysis identified the presence of an oxidized Co species and a metallic Pt species in a close to 1:1 ratio on the Pt3Co BNN surface as crucial factors in lowering the activation energy of the dehydration reaction.
O. Damari, Heymann, A. , Perry, A. , Tiberg, K. , Shlomi, I. , ו Golland, Y.. In Press.
“Empathy Deficits In Women With Complex Trauma Following Childhood Sexual Abuse”. Journal Of Affective Disorders. .
Publisher's Version תקציר Complex post-traumatic stress disorder (CPTSD) stemming from childhood sexual abuse (CSA) is characterized by profound interpersonal difficulties in later life. Despite the crucial role empathy plays in social functioning, the specific deficits in emotional and cognitive empathy in CPTSD remain understudied. This study employs a rich, naturalistic empathy task to investigate empathic responses among women with CPTSD following childhood sexual abuse. Female participants with CPTSD following CSA and female controls viewed autobiographical videos containing emotional pain, while providing dynamic ratings of their own distress and post-viewing assessments of their own and the targets' emotions. The results showed that the CPTSD group had higher levels of baseline and sustained anxiety compared to the controls, which is consistent with their heightened distress and hyperarousal clinical profiles. Emotional empathy, operationalized as synchrony between participants' and targets' distress ratings, was significantly lower in the CPTSD group, indicating diminished alignment with others' emotional experiences. Cognitive deficits were evident in the systematic underestimation of targets' anger. This study significantly contributes to the understanding of empathy deficits in CPTSD following CSA and potentially informs therapeutic strategies targeted for this population. Specifically, the findings suggest that interventions aimed at improving emotional attunement and fostering the recognition and expression of anger may enhance social functioning and therapeutic outcomes for women with complex trauma stemming from childhood sexual abuse.
S. Dery, Kim, S. , Tomaschun, G. , Haddad, D. , Cossaro, A. , Verdini, A. , Floerano, L. , Kluner, T. , Toste, F.D. , ו Gross, E.. In Press.
“Flexible No2-Functionalized N-Heterocyclic Carbene Monolayers On Au (111) Surface”. Journal Of Physical Chemistry Letters.
S. Dery, Kim, S. , Tomaschun, G. , Haddad, D. , Cossaro, A. , Verdini, A. , Floreano, L. , Klüner, T. , Toste, F.D. , ו Gross, E. . In Press.
“Flexible No2-Functionalized N-Heterocyclic Carbene Monolayers On Au (111) Surface”. Chemistry A European Journal. .
Publisher's Version תקציר The formation of flexible self-assembled monolayers (SAMs) in which an external trigger modifies the geometry of surface-anchored molecules is essential for the development of functional materials with tunable properties. In this work we
demonstrate that NO2-functionalized N-heterocyclic carbene molecules (NHCs), which were anchored on Au (111) surface, change their orientation from tilted into a flat-lying position following trigger-induced reduction of their nitro groups. DFT calculations identified that the energetic driving force for reorientation was the lower steric hindrance and stronger interactions between the chemically-reduced NHCs and the Au surface. The trigger-induced changes in the NHCs’ anchoring geometry and chemical functionality modified the work function and the hydrophobicity of the NHCs-decorated Au surface, demonstrating the impact of chemically-tunable NHCs-based SAM on the properties of the metal surface.
I. Ushomirsky, Hasson, Y. , Atia, R. , Attias, N. , Balmas, M. , Endevelt, K. , Perry, A. , Gur, T. , Hameiri, B. , Hebel-Sela, S. , Leshem, O.A. , Malovicki-Yaffe, N. , Manekin, D. , Porat, R. , Saguy, T. , Shuman, E. , ו Halperin, E.. In Press.
“Increasing Perceived Outgroup Heterogeneity Following Exposure To Extreme Violence: An Intervention Tournament In Times Of War”. Personality &Amp; Social Psychology Bulletin.
