title: A3Sr2P7O21(A = Rb, Cs): Two Polyphosphates Based on Different Types of P-O Chains and Ring Structures.
abstract: Two polyphosphates containing two types of polymerization of the [PO4] groups, Rb3Sr2P7O21and Cs3Sr2P7O21, were grown through a spontaneous nucleation method. Single-crystal X-ray diffraction data were collected in order to determine their structures. Interestingly, Rb3Sr2P7O21is the first example of two kinds of [PO3]∞linear chains coexisting in one phosphate structure. However, in the structure of Cs3Sr2P7O21, the isolated [P4O12] ring and the 1D [PO3]∞chain can be observed, which is also rare in phosphates. After careful structural analysis, the alkali-metal cations have an effect on the polymerization of the [PO4] groups and make Rb3Sr2P7O21and Cs3Sr2P7O21crystallize in different space groups. What is more, IR spectra, UV-vis-NIR diffuse reflectance spectroscopy data, and first-principles theoretical calculations were adopted to determine the optical properties and the structure-properties relationship of the compounds.
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.|University of the Chinese Academy of Sciences , Beijing 100049, China.
authors.forename: Maierhaba
authors.initials: M
authors.lastname: Abudoureheman
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Han
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.
authors.forename: Ying
authors.identifier: http://orcid.org/0000-0001-6642-543X
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.|University of the Chinese Academy of Sciences , Beijing 100049, China.
authors.forename: Bing-Hua
authors.initials: BH
authors.lastname: Lei
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences , and Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.
authors.forename: Shilie
authors.identifier: http://orcid.org/0000-0003-4521-4507
authors.initials: S
authors.lastname: Pan