Related Experiment Video
Updated: Dec 1, 2025

Synthesis of Zeolites Using the ADOR Assembly-Disassembly-Organization-Reassembly Route
Published on: April 3, 2016
A dramatic conformational effect of multifunctional zwitterions on zeolite crystallization
Lei Dong1, Dong Zhai, Zhuwen Chen
1State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology & Biotechnology, Peking University Shenzhen Graduate School (PKUSZ), Shenzhen 518055, P. R. China. hongmei@pku.edu.cn chsyang@pku.edu.cn.
Carnitine acts as a mesoporogen in LTA zeolite synthesis, while acetylcarnitine modifies crystal growth. Molecular conformation significantly impacts organic functional groups
Area of Science:
- Materials Science
- Chemical Engineering
- Crystallography
Background:
- Zeolite synthesis involves organic functional molecules influencing structure.
- Carnitine and acetylcarnitine are structural analogues with distinct roles.
Purpose of the Study:
- To elucidate the differing roles of carnitine and acetylcarnitine in LTA zeolite synthesis.
- To investigate the impact of molecular conformation on organic functional groups during zeolite crystallization.
Main Methods:
- Experimental synthesis of LTA zeolites.
- Theoretical studies including molecular modeling.
- Characterization of synthesized zeolite structures.
Main Results:
- Carnitine functions as a mesoporogen, creating mesopores in LTA zeolite.
- Acetylcarnitine acts as a crystal growth modifier, influencing crystal morphology.
- Experimental and theoretical data confirm the significant effect of molecular conformation.
Conclusions:
- Molecular conformation dictates the function of organic molecules in zeolite synthesis.
- Understanding these structure-function relationships is key for designing novel zeolites.
Related Concept Videos
Complexation Equilibria: The Chelate Effect
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
Ziegler–Natta Chain-Growth Polymerization: Overview
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

