A Spin Frustrated Hourglass Gd 9 Molecular Nanomagnet with Unusual Magnetocaloric Properties - Sai P. K. Panguluri; Eufemio Moreno-Pineda; Concepción Molina-Jirón; Sagar Paul; Marc Ubach I Cervera; Emmanouil K. Charkiolakis; David Gracia; Marco Affronte; Wolfgang Wernsdorfer; Marco Evangelisti; Jürgen Schnack; Mario Ruben (Journal of the American Chemical Society, 2025)