Zinc Complexes of T-Shaped Trans-1,2,3-Propenetricarboxylic Acid with 1-D Ribbon-Like Chain, 2-D Rhombus-Grid-Like and Herringbone-Like Layers, and Non-Interpenetrating 3-D Open Frameworkelectronic Supplementary Information (Esi) Available: Tgas, Structure Diagrams, Excitation Diagrams and Possible Hydrogen Bonds. See Http://Www.rsc.org/Suppdata/Dt/B4/B405323K/