荧光发光机理

1、 用来表示原子用来表示原子(或离子或离子)所处能量状态的符号，称为光所处能量状态的符号，称为光谱项谱项(spectral term)。 其能量状态与总自旋量子数其能量状态与总自旋量子数S，总轨道量子数，总轨道量子数L和总和总角动量量子数角动量量子数J 有关，光谱项通常表示为有关，光谱项通常表示为2S+1LJ。 对应对应L为为0, 1, 2, 3, 4, 5数值，分别用数值，分别用S、P、D、F、G、H表示。表示。 例如，例如，Pr3+，有两个自旋平行的，有两个自旋平行的f 电子，则电子，则S = 1/2+1/2 = 1，对，对f电子，磁量子数有电子，磁量子数有7个个: 3, 2, 1, 0,

2、1, -2, -3, 要使要使 L= lj为最大，为最大，2个电子个电子应该有最大的应该有最大的M = m，这就是，这就是两个电子分别应占有两个电子分别应占有m= 3, 2，因此因此M = 5，即，即L= 5. 而而J的取值范围，对于轻稀土的取值范围，对于轻稀土J = |L - S|；则；则J = 4 ，因此因此Pr3+的基态光谱项为的基态光谱项为3H4Photoluminescence mechanism :Antenna Effect 5D0 (Eu3+) :17250 cm-1ET(TA) :25160 cm-1ET(BPC) :22083 cm-1最佳匹配能级差：最佳匹配能级差：350

3、0-5000 cm-1Reviewer 1 asked about the coupling to donor energy levels. This question was side-stepped. No evidence is given for the location of donor triplet or charge transfer states. No mention is given of the mechanism of energy transfer (e.g. from which donor state and if it is exchange or multi

4、polar interaction). excitation spectra: 250390 nm ascribed to transitions from ground state S0 to first excited state S1 ( , *) of organic guests. 280 nm attributed to transitions of charge transfer (CT). The series of sharp peaks around 350-500 nm are intra-4f electronic transitions of Eu3+. The st

5、ronger intensities of broad bands from BPC and TA than that from Eu3+ themselves indicate Eu3+ are excited mainly via a sensitized process, rather than a direct excitation.(318 nm for BPC, and 300 nm for TA) location of donor triplet states can be determined by measuring luminescence spectra of thei

6、r corresponding Gd3+ complexes as model compounds. The main modes of resonance energy transfer include: Exchange interaction and multipolar interaction exchange interaction requires that donor and acceptor have overlapped wave functions, which means that the lattice spacing of them should be 0.3-0.4

7、 nm, thus theoretically, the transfer energy mechanism for BPC and TA donors to Eu3+ acceptor may belong to a multipolar interaction.2. Reviewer 3 noted that the spectra presented in Fig 4 utilized 395 nm excitation: i.e. directly into the 7F0-5L6 transition of Eu3+ so that no comparison of energy t

8、ransfer efficiency from a donor state can be made. As requested previously, it is necessary to compare the emission spectra using excitation into the ligand absorption band and not into Eu3+ levels. Such a comparison has not been made. Gave contrast of emission spectra at 318 nm in BPC-LEuH, and 300

9、 nm in TA-LEuH and 395 nm (Eu3+ levels)3. The explanations of energy transfer efficiency given in manuscript are either vague, irrelevant or confusing. Line 38 attributes it to the higher aggregate ability of BPC-LEuH; line 19 to the 2 carbon rings of BPC rather than TA; line 26 to the excess neutra

10、l BPC present; finally, line 50 et seq. to many factors (quenching effect of hydroxyl groups, solvent type?, layer crystallinity). higher aggregate degree of composite materials in BPC-LEuH there is excess neutral BPC energy levels coupling of donor and acceptor structure nature of organic donors (c

11、onjugated effect, BPC with two benzene rings, TA with one ) excitation spectra of EuxGd1-x(OH)2.5Cl0.5 0.9H2O at 615 nm: (a) x = 1.0, (b) 0.8, (c) 0.6,(d) 0.4, (e) 0.2, (f) 0.1, (g) 0.07, (h) 0.05, (i) 0.03, (j) 0.01, (k) 0.005.Eu 多时，用多时，用Eu的激发的激发Eu少时，用少时，用Gd的激发的激发The presence of Eu emissions through the excitation of Gd transitions indicates efficient energy transfer from Gd to Eu, suggesting there is a strong interaction between these two ions in the host hydroxide layer.查 Figure S3Inorg. Chem. 2010, 49, 2960.the electronic transition from the Gd ground level 8S7/2 to excited levels 6D