Yan Xue, Luo Siyang, Lin Zheshuai, Yao Jiyong, He Ran, Yue Yinchao, Chen Chuangtian
Beijing Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
Inorg Chem. 2014 Feb 17;53(4):1952-4. doi: 10.1021/ic4029436. Epub 2014 Jan 28.
Two novel rare-earth beryllium borates ReBe2B5O11 (Re = Y, Gd) have been discovered. These materials possess a unique structural feature with a platelike infinite ∞(2)[Be2B5O11]3– superlayer, which is first found in beryllium borates. The superlayer can be seen as sandwich-shaped with ∞(1)[B4O8]4– chains linking up with a ∞(2)[Be2BO5]3– sublayer above and below via the B–O–Be bond. Each ∞(2)[Be2B5O11]3– layer is further connected to the neighboring layer through Re3+ cations coordinating with O atoms. Both of these two crystals have very short cutoff wavelengths below 200 nm and exhibit relatively large nonlinear-optical (NLO) effects, indicating their promising applications as good deep-UV NLO crystals.
已发现两种新型稀土硼酸铍ReBe2B5O11（Re = Y，Gd）。这些材料具有独特的结构特征，带有层状无限∞(2)[Be2B5O11]3–超层，这是在硼酸铍中首次发现的。该超层可视为三明治形状，∞(1)[B4O8]4–链通过B–O–Be键与上方和下方的∞(2)[Be2BO5]3–子层相连。每个∞(2)[Be2B5O11]3–层通过与O原子配位的Re3+阳离子进一步与相邻层相连。这两种晶体在200nm以下都有非常短的截止波长，并表现出相对较大的非线性光学（NLO）效应，表明它们作为良好的深紫外NLO晶体具有广阔的应用前景。
